Are you trying to find portable cb radio among various brands on the market but aren’t sure where to begin? To assist you in finding the right one, we’ve put together a list of the 7 best to help you pick the perfect one!
We investigated and evaluated a number of the top-selling portable cb radio on the market in order to create our list of the best. Making a decision among the many options available is never simple. There are an infinite number of models available, each with a distinct price. And as you’ll find out, the best options aren’t usually the ones you imagine! This comparison is rich and relevant because of the numerous factors that were employed. You will find products featured in this ranking not only based on their pricing but also on their features and other customers reviews. To write this review, we completed 15 hours of research and did 82 portable cb radio tests. You won’t need to pick products at random any more. If you’re unsure of what to look for, browse our list and consult the buying guide!
An overview of our top picks
Table of contents
The best portable cb radio you can buy today
- Magnetic Mount Antenna - The HH RT 50 Road Trip includes a magnetic antenna so you can operate your handheld CB radio from within your vehicle. Mount the magnetic antenna to the center of your roof on your car for clearest connection.
- Soundtracker System – Dramatically improves the transmission and reception of CB radios by filtering through 90% of noise. This system reconfigures the transmission signal and allows it to be transferred more effectively through cluttered air waves.
- NOAA Weather & Emergency Radio - Be prepared and never surprised when it comes to changes on the road ahead. Get 24-hour updates on weather conditions, emergencies, and incoming hazards with the built-in NOAA Weather Radio Channel.
- Maximum Awareness - With the Dual Watch feature you can program your radio to monitor two pre-selected channels at once. Tune to the 1st channel you want to program. Press and hold the DW button until "DW" begins flashing on the display.
- Full Coverage - CB radios provide reliable communication which is not dependent on satellites and cellular networks. This CB Radio can access up to 40 CB radio channels and scan to find the one with the best signal with the touch of a button.
- Omni-Directional Microphone – This microphone allows for voices to be picked upfrom all directions. Other benefits also include a more natural sound, handling high sound pressure levels, and it is less sensitive to wind, pop, or handing noise.
- Durable Design for Any Adventure: Built to withstand the toughest journeys, this handheld CB radio features rugged construction, making it the perfect travel companion for all your adventures. Its HI/LO power settings ensure prolonged battery life, ensuring you stay connected on the go. Screen activates when button is depressed, minimizing light disturbance.
- Powerful 4-Watt Output for Extended Range: Enjoy maximum communication range with the 4-watt output power of this handheld CB radio. The advanced PLL channel selection technology allows for pinpoint accurate tuning, ensuring clear and reliable communication wherever you roam.
- Squelch Control for Noise-Free Communication: Say goodbye to unwanted background noise with the Squelch Control feature. This function effectively eliminates interference, providing you with crisp and clear voice quality during your conversations.
- Versatile Power Options for Uninterrupted Communication:Stay powered up in various settings with this handheld CB radio. Powered by DC sources like cars, trucks, RVs, or boats, it offers excellent portability. The charge jack, featuring nickel cadmium batteries, allows you to charge the batteries without removing them from the radio, ensuring uninterrupted communication.
- Optimal Performance: Choose your preferred power source for the ultimate communication experience. The handheld CB radio gives you the flexibility to use 9 AA alkaline batteries or rechargeable NiCad batteries (both not included). Additionally, it comes with a convenient 12V DC adapter, ensuring you always stay connected with clear and crisp voice quality. Enjoy optimal performance with flexible battery choices!
- The Uniden PRO401HH delivers the convenience of a handheld CB radio with the security of knowing you have the longest range possible so you can always stay in touch.
- Features a low-power setting to conserve battery life and a high-power setting so you can extend your range When needed.
- Designed for use in the citizens band (CB) radio service, the PRO401HH mobile radio will operate on any of the 40 CB frequencies authorized by the (FCC).
- Whether you're in your car, truck, Van or bike, over the road, camping out or just out hiking the trail, The high performance PRO401HH s you're never out of touch.
- It’s compact and lightweight, weighing approximately 1 pound making it easy to operate with one hand. The design features strategically placed controls and jacks on the top, left, and right side.
- You can use rechargeable (9 AA Ni-MH) or alkaline (9 AA) batteries (not included). The included DC power cable will also charge your AA Ni-MH batteries. A switch inside the battery compartment lets you select rechargeable or alkaline batteries.
- Included Components: Uniden PRO401HH Handheld CB Radio, Flexible Antenna (BNC), Belt Clip, and Strap
- How can we help? Uniden’s Customer Support site is designed to conveniently walk you through product setup and troubleshooting.
- COMPACT & AFFORDABLE; The PRO505XL is ideal for CB users seeking an affordable CB Radio with Public Address, Instant Channel 9 Emergency Button, Channel Up/Down Buttons, and S/RF Meter.
- DURABLE & EASY TO USE; The PRO505XL Compact CB Radio uses advanced microelectronics to pack plenty of power and features into a modern, compact design; Offers full 40-channel operation with dynamic squelch control for crisp, clear sound.
- BACKLIT LCD DISPLAY; With an orange backlit LCD display, this Bearcat CB radio is optimized for day or night viewing, view the current channel, the volume, and other features on the display.
- SQUELCH CONTROL; Dynamic squelch control for optimal sound, turn the squelch knob to adjust the level at which the radio suppresses weak radio signals, this provides you with high-quality sound.
- 40 CHANNEL OPERATION; Enjoy the complete range of 40 CB radio channels to communicate with those around you; The backlit display is easy to read, even in low light conditions.
- INCLUDED IN THE BOX; CB Radio, Microphone and Hook, Mounting Hardware, Knobs, Mounting Bracket, User's Manual; CB Radio antenna required, not included, sold separately.
- Portable CB Radio – This Portable CB radio from Midland features 40 CB channels, Dual Watch monitors channel 9, 10 NOAA channels, and 4 Watts of output power. Its lightweight design can be converted into a mobile radio with the required accessories.
- Power Source – Power your CB radio with six AA batteries or use the included cigarette lighter adapter for mobile use. 4-watt output power delivers maximum communication range. Hi-Low power mode.
- NOAA Weather Alert – You’ll have instant access to NOAA weather/hazard information 24/7. Instant channel provides immediate access to emergency channel 9 and informational channel 19. Last channel memory turns to the last user selected channel.
- LCD Screen – A large, backlit LCD screen provides a multifunctional display that’s easy to read, day or night. ANL (automatic noise limiter) and squelch control for improving reception and eliminating noise
- What’s In The Box – CB Radio, AC wall adapter, alkaline battery compartment, rechargeable battery compartment,cigarette lighter adapter for mobile use, antenna, hand strap, belt clip, and the owner’s manual.
- MAGNETIC MOUNT PORTABLE HIGH-GAIN ANTENNA - will greatly increase the transmit and receive range by simply placing the antenna on your roof, and the ultra strong magnet will hold it firmly in place.
- NOAA WEATHER CHANNELS - NOAA Weather 24 hours a day with Alerts keeps you informed when severe weather threatens.
- DUAL WATCH - Dual Watch feature lets you talk on one channel, while keeping an ear on another channel you are interested in.
- 40 CHANNEL ACCESS - Navigate the complete range of 40 channels for full coverage of CB stations.
- The PRO501TK can also be used with the included flexible rubberantenna and rechargeable or Alkaline batteries for portable use. Uniden is THE name in CB radios.
- Scan / Skip Feature
- AM/FM
- Handheld
- 7 color display
- ANL built-in
- Noise blanker
- Noise gate
- Compander
- Key beep
- Roger beep
- DUAL HANDHELD/MOBILE CB RADIO - Use as a portable Handheld CB Radio with batteries or slide on the DC Adapter with External Antenna connector to use like a Fixed Mount CB Radio for maximum range.
- LARGEST LCD IN CLASS - easy to see channel numbers and features. New CB FM Mode included. Great to have as a 2-Way Handheld Emergency Radio too.
- NOAA WEATHER & EMERGENCY RADIO – Be prepared and stay informed when severe weather threatens with 24-hour updates. And the Dual Watch feature lets you talk on one channel, while keeping an ear on another channel you are interested in.
- HIGH POWER 4-WATTS / LOW POWER 1-WATT - Use High power 4-Watts to punch out the strongest signal, or Low power 1-Watt to preserve those batteries. Remember Uniden is the name and CB Radios.
- FULL COVERAGE - The Uniden PRO538HHFM includes the CB Radio features you need every day. Full access to 40 CB channels lets you tune into the action channels or break away to do your own thing.
- PAKAGE INCLUDES - Whip Antenna, Belt Clip, Hand Strap, Owner’s manual, Slide on DC Adapter with External Antenna connector, Slide On NiMH Rechargeable Battery Tray, and Slide on Alkaline Battery Tray. (Batteries not included).
- Portable, compact, and powerful: The Wouxun KG-S72C offers modern CB communication in a handheld, easy-to-use device at an affordable price.
- FCC-approved AM/FM operation: The first CB radio to receive approval for both AM and FM operation, ensuring reliable and versatile communication.
- Customizable and user-friendly: 400 customizable memory channels, Favorite Channels function, and configurable keys cater to your personal needs without requiring prior training.
- Rugged and weather-resistant: IP65 dust and water resistance ensures the KG-S72C operates smoothly in various indoor and outdoor environments.
- Long-lasting battery life: The 2000mAh lithium-ion battery pack provides hours of operation on a single charge, easily recharged via USB-C port.
- Wide accessory compatibility: Utilizes Kenwood 2-Pin (K1) audio connector for various accessories and is compatible with Wouxun S-series radio batteries, chargers, and power accessories.
- 7 Color LCD Display
- Weather Channel
- ASC Automatic Squelch Control
- VOX
- 2 Programmable Emergency Channels
- Accessories included: AC Adapter, Battery Pack, Belt Clip, Wrist Wrap, Cigar Lighter Plug, Microphone Support, External Antenna Adapter
- Ultra-compact: This portable CB is easy to use for beginners with better sensitivity and RF gain control and ability to use AM/FM radio stations. With a microphone, this radio is easy to carry around if needed.
- Squelch Control: 9 Automatic Squelch (ASQ) for FM and 29 Manual Squelch for AM helps this radio block out background static and noise when receiving.
- Instant Emergency: This mini CB has access to Channel 9 (emergency), Channel 19 ( truckers) for use in any emergency scenario.
- 4W Power Output: Work with external speaker and the VOX function, which is safe to use while driving; Backlit displays; Channel scan; Keyboard lock.
- Recommend Accessories: We recommend using a 16.4ft long CB antenna with magnet mount(search B09P1GXG4S on Amazon) and a mini CB radio speaker (search B07Y7531C9 on Amazon) with this mini mobile CB radio for best performance and ease of use.
- Dual-Mode AM/FM Convenience – Efficient communication while on the road just got easier. This CB radio provides access to both AM and FM channels, allowing communication with more users, long range or near, and with better sound quality.
- Ultra-Compact Design – A full-featured CB radio for recreational or professional use that easily fits in the palm of your hand. Whether you are off-roading or going on a road trip the 19 MINI will be there to assist you when being left on your own.
- Clear Communication – With 40 channels, full 4 Watts RF output power, and a heavy-duty mic, you are guaranteed loud and clear sound. Perfect for construction and delivery drivers to provide an effective way to coordinate with their team.
- Hardwire or 12V CLA Power Options – Includes 48" Hardwire Kit for direct-to-battery installation & 48" 12V Power Adapter for instant power. Conveniently connect or disconnect from the MINI CB as needed (12V Power Adapter included with 19 MINI AM/FM).
- Instant Channels 9/19 – Instantly switch to emergency channel 9 or information channel 19 with one push so you can keep other truckers informed of the road ahead whether it is regarding road construction, accidents, or possible speed traps.
- VOX Hands-Free Usage – With the 19 MINI CB Radio you can stay safe on the road and enable the hands-free CB operation to automatically transmit when you speak. This feature will make it so you never have to take your hands off the wheel.
- Adjustable Receiver Sensitivity – Stay connected and clearly communicate when it matters most. Easily adjust RF Gain sensitivity to reduce background noise and static without reducing reception, resulting in the best signal while on the road.
- The CMX760 is an Ultra-Compact CB Radio w/ Mic Display and controls. Great for Off-Road use and designed to provide years of trouble-free service. Ultra-Compact for Easy Mounting Just 4 x 4 x 1 Inches.
- Use in Jeeps, trucks, cars or anywhere space is limited or a small CB is desired. If using in a noisy environment (open-air Jeep, diesel truck), an external speaker is recommended, such as Uniden's BC15 speaker.
- The Uniden CMX760 represents the highest quality communications device designed for use in the Citizens Band Radio Service. It will operate on any of the 40 CB frequencies authorized by the (FCC).
- "Easy to install, the CMX760 is the perfect ultra-compact size and easy to mount on top or underneath your dashboard or even under the driver’s seat in a vehicle.
- Its rugged components and materials are capable of withstanding harsh environments.
- INCLUDED IN THE BOX: CMX760 CB Radio, Speaker/Microphone with remote LCD, Microphone Hanger with hardware, Extension cable, Slide mount bracket with hardware, DC power cord with fuse, User's Manual. (CB Radio Antenna required, Antenna not included, sold separately).
- Uniden’s Professional Series PRO520XL Heavy-Duty CB radio offers a full 4 watts transmit power, with RF gain control, and 40-Channel operation in a compact rugged construction CB radio.
- The PRO520XL has a front mount 4-pin electret microphone with extra-long coiled cord, S/RF LED meter, instant emergency channel 9, transmit indicator lights, Automatic Noise Limiter switch, Public Address switch, Volume control, Squelch control, and more.
- Extremely popular for Industrial, Commercial, and Off-Road use. Easily fits in most any vehicle because of its compact size.
- Built-in External Speaker Jack allows connecting to an optional external speaker, and you can use the Public Address function to be heard outside your vehicle with an optional PA speaker.
- A superheterodyne circuit with phase locked loop technology assures precise frequency control. Included in the box: CB Radio, Microphone and Hook, Mounting Hardware, Knobs, Mounting Bracket, User's Manual. CB Radio antenna required, not included, sold separately.
- 40-channel mobile CB radio with superheterodyne circuit/phase locked loop for precise control
- Built-in automatic noise limiter and auto-squelch to eliminate noise and improve communication
- Signal/RF meter and LED indicators to monitor activity; instant channel 9 access for emergency situations
- Connect external speakers and use PA/CB switch for use as a Public Address system
- Front-positioned microphone with extra-long, coiled cord for convenient use
- AM/FM
- Compact
- USB Charging Socket
- Weather Channels
- Electret/Dynamic Compatible Mic
- Emergency Channels
- 7 color display
- Drive with confidence and stay connected with the Uniden Bearcat 880 CB radio, Powerful rugged design with advanced features and settings to suit any CB user.
- The Bearcat 880 boasts 4 Watts of transmit power with full 40 channels, NOAA weather channels, and instant channel 9 for emergency channel access.
- Loaded with features, such as dynamic squelch control, Hi/Lo mic Gain Control, Memory Channel Scan, ANL Noise Filter to reduce background noise, and a Noise Canceling Microphone w/ Extra Long cord.
- What really sets the Bearcat 880 apart from other CB radios is the Display. The Large, Easy-to-Read display offers 7 Backlight Color options to Customize your radio!
- Includes Microphone, Mounting Bracket Kit, DC Power Cord, 6-pin to 4-pin microphone adapter, owner's manual, and 2 year extended manufacturer warranty.
- The Uniden PC68LTX Professional 40 Channel CB Radio brings back the high quality circuitry that made Uniden famous!
- Radio operators have been mourning the disappearance of the "high-cut" audio option from Uniden's CB Radio line up for quite some time. Now Uniden has reintroduced the high-cut audio in the PC68LTX mobile CB radio!
- The Uniden PC68LTX is elegantly styled and packed with the most popular 2-way radio features in a user friendly package that will be familiar to all Uniden CB fans!
- A bright LED channel indicator, easy to read meter, front panel Mic connector, and Uniden's classic controls with an enhanced channel selector that offers more positive channel selection and reduced drift are some of highlights to the new PC68LTX.
- The PC68LTX includes an extra-long mic cord for operator convenience even in the largest of vehicle cabs.
- RF gain control, Mic gain control, PA/CB switch, Analog S/RF meter, instant access to channel 9, and a sturdy mic with left side positive push to talk make the PC68LTX loaded with the features that professional drivers have enjoyed for years!
- And the reintroduction of the high-cut audio switch will make any veteran driver happy while newer CB radio operators will enjoy the clarity and frequency response that Uniden's high-cut audio brings to the conversation.
- Classic CB Design – Cobra’s classic CB radio has been the standard of excellence in professional CB radios for over 50 years. This radio is durable, reliable, and full-featured with 4 watts of power and access to all 40 CB channels.
- Dual-Mode AM/FM – Efficient communication while on the road just got easier. This CB radio provides access to both AM and FM channels, allowing communication with more users, long range or near, and with better sound quality.
- Easy to Operate - Ergonomic design with intuitive controls make this radio easy to operate. The included 9-foot microphone cable makes it simple to speak into and reach regardless of vehicle size and results in less clutter vs storing a longer cable.
- Instant Access to Channel 9 – CB radios provide reliable communication which is not dependent on satellites and cellular networks. Get access to all 40 CB radio channels and instantly access emergency channel 9 to get updates from law enforcement.
- SWR Antenna Calibration – If your CB antenna is hit with tree branches or other items, adjust and calibrate SWR meter for optimum antenna performance and get notified when your SWR antenna needs to be checked with the illuminated indicator.
- Adjustable Receiver Sensitivity – Stay connected and clearly communicate when it matters most. Easily adjust RF Gain sensitivity to reduce background noise and static without reducing reception, resulting in the best signal while on the road.
- ✅[2nd Gen TD-H8 Ham Radio Handheld] This handheld two way radio features 10 watt output power, 2500mAh rechargeable battery and incredible 1.77 inches large color screen. And most importantly, TD-H8 is taking the lead of wireless programming, allow user to customized the radio thoroughly via phone, free from the limitation of PC and programming cable, dedicated to providing a better outdoor experience for US ham radio enthusias.
- ✅[Real 10 Watt Power] TIDRADIO TD-H8 2nd Gen is a dual band ham radio with TWO POWER TUBES. Such special design allows it to transmit consistently at a relatively high output power as much as possible across the frequency range, provides you a longer communication range when compared with usual 5watt/8watt/10watt radios.
- ✅[Mobile Programming and allows for Linking to Repeater Lists] No TIDRADIO wireless programmer needed, no computer needed, no driver needed, no need to bother about which programming cable to use. The new build-in wireless programming module allows you to manage your 2 way radio directly on your phone anywhere anytime.And you can link up to a nearby Repeater listing through the APP on your phone!
- ✅[Multiple Feature in One APP] Load your phone with Odmaster. Odmaster have multiple features like Channel editing, Nearby repeater search&Import, Radio Configs Save/Share, all these can be access on your mobile easily. We also provide free APP updates and features upgrade, no need to purchase another radio.
- ✅[2500mAh Battery] Rechargeable 2500 mAh Li-ion Battery, larger capacity when compare with regular baofeng walkie talkies 1800 mAh Battery. Bigger battery supports 12 Hours continuous use, 60 Hours standby. The power save function can further extend your 10 watt ham radio up time.
- ✅[LCD Large Color Screen] Bigger screen, better color, better detail. Compare with traditional baofeng radio screens like baofeng uv-5r, baofeng bf-f8, baofeng ar-152, and baofeng uv-82, TD-H8's screen can display the current output power and has larger text to show the channel information, giving you a better visual experience than usual portable ham radio.
- ✅[Multiple Radio Function] TD-H8 features multiple functions like other handheld ham radio : Dual Band, Dual Watch, NOAA Weather Mode, Disply Sync, CTCSS/DCS, Scanning, VOX, Remote/Site Alarm......
- ✅[What's in the box] TD-H8 2nd Gen Ham Radio, 2500mAh Battery, Charge base, Belt Clip, User Manual. We provide 60-day hassle-free replacement service and professional technicians to help solve your problems.
- ✅[After-service] After purchasing TD-H8, you can not only enjoy our return and exchange services, but also receive software updates from us. Please let us know immediately if you encounter any issues during use.
- With Function VFO and Memory channels,Dual display / Dual standby/ Auto Keypad Lock;FFC ID: 2AJGM-UV5R
- The Radio is necessary for traveling, survival, hiking, cycling, work, camping, fishing, Emergency Alarm. it is Walkie talkie lover's favorite.
- Support CHIRP and Keypad Programming:The UV-5R walkie-talkie can directly program the frequency manually, also work fine with CHIRP;
- Suitable for various places such as hunting, mountain climbing, camping, hiking, self driving tours or police patrol
- Package Include: 2 X Portable radio; 2XAR-771; 2 X 1800mAh Li-ion battery; 2 X Charger; 2 X Belt clip; 2 X The sling; 2 X Earpiece; 2 X User's manual.
How to choose a good portable cb radio
Does the idea of finding a fantastic portable cb radio make you anxious? When it comes to purchasing this product, specifically when deciding which model to select, has your head been spinning between options? You are not alone if that is the case. We are aware of the pressure involved in the purchasing process!
Your presence here indicates that you are interested in portable cb radio. Before choosing which product would be the best for your needs after being inundated with information, locate a reliable source with genuine selections. You can get that information from a variety of sources, including buying guides and rating websites, word-of-mouth recommendations from friends and family, online discussion forums where users can share their own experiences, product reviews that can be found all over the internet, and YouTube channels. You can only get the right product through exhaustive analysis. But you realize that’s not always simple. In order to ease your concerns, we have taken the time to develop a list of the top portable cb radio products available right now. You might be wondering how we came up with the list. How was this buying guide developed?
First, we used our algorithms to gather as much reliable data as we could about these products. To verify all the data gathered, we used both artificial intelligence and a lot of algorithms.
Then, our experts used criteria that are recognized in the business to evaluate them according to their quality to price ratio, allowing us to choose the top portable cb radio on the market right now!
The selection of the goods is not arbitrary. Before creating a list, we take into account a number of factors. Below are some of the criteria discussed:
Brand Value: What happens if you choose a dubious brand just because it appears to be a good deal? So the likelihood of receiving a product with a short shelf life increases. That is due to the fact that well-known brands have a reputation to uphold, while others do not. Top portable cb radio brands strive to provide some distinctive traits that set them apart from the competition. So, hopefully one or more of the items on our list will be perfect for you.
Features: Useful features are all you need, not tons of them. We consider the important aspects and select the top portable cb radio based on those.
Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products with higher specifications, but with the right balance.
Quality: A product’s quality may always be quantified with the aid of numbers. We look for goods with better standards that strike the proper balance. The best quality product that gets highly appreciated and recommended by experienced users.
Customer ratings: Would it be accurate to suggest that the portable cb radio were used by hundreds of customers before you? Superior ratings indicate that many customers had better service.
Customer Reviews: Like ratings, provide you with accurate and reliable information about the product from genuine customers. Customer ratings are very important to all of us because they contain accurate and reliable information about the customer service we received from several hundred customers.
Seller Rank: This is very intriguing! Not only do you need a good portable cb radio, you also need a product with rising sales that is trendy. It accomplishes two goals. First, the expanding user base proves the quality of the product. Second, given that number, producers must be able to offer greater quality and after-sales support.
Value: You get what you pay for, they say, so consider the value. Cheap isn’t always good and expensive isn’t always bad. However, that does not imply that spending a lot of money on a product that is flashy but underwhelming is a good idea. Before adding them to the list, we make an effort to evaluate how much value you can get for your money from your portable cb radio.
Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting portable cb radio for months and years to come.
Product availability: Products come and go, and new ones replace the old ones. Most likely, a few new features and required changes were made. What use is it to use a supposedly good product if the maker no longer supports it? We make an effort to highlight products that are current and offered by one or more trustworthy sellers, if not more.
Negative Reviews: Yes, we do take that into account as well! The goods with the majority of bad reviews are filtered out and disregarded when we choose the best-rated one on the market.
These are the standards by which we selected our portable cb radio. Do we end our process there? Hell no. The most crucial fact about us that you should be aware of is that we regularly update our website with current and pertinent information. We have one more layer of filtration since we place the greatest importance on reader satisfaction. Please let us know if any product included here is incorrect, irrelevant, subpar, or simply out of date. We always value your opinions, and we’ll work hard to make any necessary corrections to our list in response to them.
Why should you believe us?
There are now thousands of possibilities for these products on Amazon, but choosing the best one can be difficult and time-consuming. And what portable cb radio should you purchase in 2022?
This guide is the result of more than 10 years of experience in researching, testing and writing about many topics. Each member of our team is an authority in their area. We read every article we could find online and every consumer review on every retail website for seven hours. Additionally, we discovered a ton of websites that offered helpful resources, including buying tips and thorough information on portable cb radio.
