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The 8 Best bike air horns of 2025

Are you trying to find bike air horns 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 bike air horns 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 28 hours of research and did 42 bike air horns 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 bike air horns you can buy today

SaleNo. 1
Delta Cycle Airzound Bike Horn - Loud 115 DB Bike Horn for Adults - Rechargeable, No Batteries Needed - Adjustable Volume - Weatherproof Thermoplastic - Bicycle Horn for Road and Mountain Bikes
  • Ride with Safety :: One of the world’s loudest bike horn, the Airzound has an adjustable volume switch that offers up to 115 decibels. Its loud enough to reach inside vehicle cabins, instantly grabbing attention.`
  • Compact & Rechargeable :: Compact horn design with no batteries required, our bike horns for adults loud recharge with your bike hand pump. Saving time and money, the air reservoir stores in any standard bottle cage or zip ties to your frame.
  • Reliable Quality :: With weatherproof molded thermoplastic and a tough PET bottle, our bike horn loud offers long-lasting durability. Come rain, sleet and snow, it functions in any condition for year-round use and safety.
  • Easy to Install :: Whether you ride a hybrid, single speed or road bike, our loud bike horn is compatible with handlebars 22-26mm in diameter. With hardware included, it clamps securely in place for a quick, easy setup.
No. 2
ZIREN High-Traffic Bike Horn Bell Siren & LED Light Super Loud Electric Alert Rechargeable IPX4 Front and Back Lights (ZIREN Micro USB)
  • 6 POWERFUL SOUND-FX FOR LOUD ENVIRONMENTS: Designed to make sure you’re heard in the noisiest settings, the ZIREN horn delivers six distinct sound effects to cut through traffic, crowded streets, and rugged trails. Engineered for maximum attention-grabbing power, this horn ensures your presence is known with both sound and light. Disclaimer: Always use responsibly and prioritize safe riding practices over reliance on any device.
  • 8 LIGHT MODES FOR DAY OR NIGHT: The ZIREN features 8 dynamic lighting modes in a range of colors, designed for ultimate versatility. Use it as a standalone backup light when your main headlight runs out of power, or pair it with your headlight to double your visibility. With a variety of strobe and SOS settings, you’ll be seen clearly in any lighting condition, day or night.
  • DUAL ACTION LIGHT & SOUND: The ZIREN features a dynamic combination of sound and light for more attention. Not only do you hear the horn, the integrated LED lights also flashes simultaneously, for optimal attention. Disclaimer: Always use responsibly and prioritize safe riding practices over reliance on any device.
  • REDESIGNED V2 CONTROLLER SWITCH: The upgraded horizontal button layout, paired with larger buttons, ensures effortless horn activation. The ZIREN bike horn and its remote switch are fully compatible with standard handlebars up to 1.5" in diameter, offering seamless integration for all riders.
  • UPDATED V2 USB-C RECHARGING: The ZIREN horn and bonus KIT-R1 rear light provide extended run times with SOS and flash modes. Featuring USB-C recharging for rapid 2.5-hour charging and an it is water-resistant, ensuring reliable performance in all weather conditions.
SaleNo. 3
Hestya 3 Pieces Kids Bike Horn Air Squeeze Honking Horns Plastic Bicycle Horn Scooter Horn for Kids Boys Girls
  • What you will receive: you will get 3 pieces of children bike horns in one package, and there are 3 different colors, namely red, blue, and pink; The sufficient quantity is enough for children's use and replacement, and the different colors can meet children's different needs
  • Reliable materials: the body of the bicycle horn is made of quality plastic, which is sturdy, durable and solid; And the ball of the horn is made of rubber, which is soft and wear-resistant; Both the materials are strong and tough, and they are not easy to break
  • Joyful and secure experience of sliding scooter: when these beautiful and delicate scooter horns are installed on children's scooters, they will feel happy, and they can remind passers-by by pressing the horns, which can help them have a good sliding experience
  • Easy to install and use: these bike horns are easy to install, you just need a screwdriver, and then attach the bike horn to your kid's bike or scooter; They are also very convenient to use, you only need to gently pinch the rubber ball on the top of the horn, and the horn can make a crisp sound
  • Wide range of applications: these lovely horns can be installed not only on children's scooters, but also on children's bicycles, folding bikes, and anywhere needed and appropriate; Children can even use these horns as toys or as decorations at home
No. 4
WEERAS Vintage Bicycle Air Horn Triple Note, 11-inch Large Horn, Suitable for Most Bicycles
  • 【Size】:Size: Horn length: 11 inches / 279mm, rubber ball diameter: 2.36 inches / 60mm, suitable for 22.2mm diameter handlebars. Same applicability, bigger size.
  • 【Material】:Made of steel tube, the outer layer of electroplating, so that the horn is not afraid of the wind and sun more robust and durable. Rubber ball texture is soft, easy to use and does not hurt your hands.
  • 【Appearance】:The electroplated silver tube makes the whole horn look very bright. The three tubes of different lengths make your bike even cooler.
  • 【Installation flexibility】:We use a long screw and two snaps to link the horn and handlebars, so the design is more flexible can be adapted to more bicycle handlebars. Also, only a screwdriver and an Allen wrench are needed to complete the installation.
  • 【Note】:Because it is a three-tube structure, it requires a quick squeeze of air to achieve the best results when using it. If you want to easily achieve a loud effect can be properly blocked 1-2 of the tubes, the effect will be very significant.We will be including a rubber stopper with future products, so for customers who have already purchased but don't think it's loud enough, contact us and we'll send you a rubber stopper.
  • Note: The plugs are removable using the clamps. Plugs placed in medium length tubes will allow the horn to produce two sounds at the same time, while placing them in the shortest tubes will make the sound produced sound like only one.
No. 5
Bugle Horn, Retro Clown Horn, Kids Bike Horn, Coolrunner Classic Vintage Metal Twist Loudspeaker Siren Hooter Snail Air Horn for Vehicles Bicycles Golf Cart (Black)
  • MATERIAL: Polished stainless steel is non-fading, durable and weather resistant, does not readily corrode, or rust and the rubber ball is soft for using, prevents scratching.
  • HORN SIZE: Length-18cm(7.0"); Horn ball diameter - 5.5cm(2.2"); Metal mouth - 7.3cm(2.9"). Mounting dimensions: Handlebar diameter - 2.22 cm(0.87").
  • EASY TO INSTALL: Just use a hex key/screwdriver(not included) to tighten the screws, easy to install and remove from the handle bar of a bike.
  • SAFE AND LOUDLY: Clear the way with a distinctive honk by squeezing the rubber ball on the horn, the unmistakable sound lets everyone know you're coming.
  • This classic retro bicycle bell is universal for any vehicles as Golf Carts, Boats, RV's, Bicycles, Motorcycles, etc. Customize your bike the way you want for making a great attraction on your bike.(For ages 6 and above)
No. 6
Hornit dB140 Bike Horn (dB140 V3)
  • The World's loudest cycle horn. 140dB at source the dB140 puts you in control of your safety because it gives you a way to make people know you’re there even when they aren’t looking.
  • Two horn modes. “piercing mode” is a high-pitched 140db duo tone, primarily for road use, designed to be heard by car, van and truck drivers as well as pedestrians with headphones. “horn mode” is a 121dB car horn style sound designed to be used to warn pedestrians in parks and on trails.
  • Two handlebar mounts included. to ensure a perfect fit with all handlebar sizes two mounts are included-one mount for bars with a diameter of 22-26mm with 4 differently sized spacers and a second dedicated to 31.8mm diameter bars (road bikes).
  • Enjoy the ride. the dB140 gives you the ability to let other road users know you’re coming and that alone makes cycling much less stressful. No more shouting, fewer emergency stops, and more time spent enjoying the ride.
  • The small, sleek, and completely weatherproof horn weighs only 3.6 ounces (including mount, trigger, and batteries). 2 x AAA batteries included which last up to 12 months with normal use (normal use is 6 x 1 second blasts per day).
No. 7
ROCKBROS Electric Bike Horn 120dB Adults Kids Bike Horn Alarm IPX4 Waterproof Electronic Bicycle Horns for Handlebars Ebike Scooter Horn Black
  • 120dB BIKE HORN: Max volume is 120db, enough to alert the walkers or slow bikers you are approaching, no more yelling on the road, good for daily commuting. Built-in CR2032 replaceable battery, no need to frequently remove from the bike after one replace.
  • FAST INSTALLATION: Easy to install and protect bike paint with elastic rubber strap, no extra tools needed. High-elastic straps help to mount on different diameter handlebars.Firmly attached to the frame even on the bumps and extreme roads.
  • SMALL & PORTABLE: Small and light, weight only 34g, it takes up less space on the handlebar and can be used on road/mountain bikes, e-bikes, dirt bikes, folding bikes, kids bikes or scooters. Three colors--Black/Red/Blue is available to match your bike.
  • MINIMALIST DESIGN: Just press to sound, simple and quick to let passersby know. The trumpet shape is stylish and loud, IPX4 level waterproof, not afraid of light rain during riding,but do not recommend to use or put under the heavy rain.
  • Any using question or problem please let us know, we will help you to figure out and solve it.
No. 8
Bike Horn, Retro Clown Horn, Metal Classic Air Horns Loud Sounds Bicycle Horn, for Vehicles Bicycles Golf Cart
  • HIGH QUALITY MATERIAL: Good quality; Metal housing for the pump; good durability; long time
  • EASY TO INSTALL: Just use a hex key/screwdriver(not included) to tighten the screws; easy to install and remove from the handle bar of a bike
  • SAFE AND LOUDLY: Clear the way with a distinctive honk by squeezing the rubber ball on the horn
  • UNMISTAKABLE SOUND: Hand held air horn great for creating super loud noises; 120db ultra loud like a truck horn does; loud enough to attract others' attention
  • PERFECT ACCESSORY: This classic retro bicycle bell is universal for any vehicles as Golf Carts; Boats; RV's; Bicycles; Motorcycles, etc
SaleNo. 9
EZYoutdoor Aluminum Alloy Retro Bicycle Horn, Loud Metal Twist Snail Air, Bike Horn for Kids, Golf Carts, and Vehicles
  • Widely Application: Use as golf cart horns, horn for bike; Toot horn would attention to the people while cycling
  • High Quality: Retro bicycle accessories, durable and weather resistant The golf cart horn helps clear the way with a distinctive honk by squeezing the rubber ball on the horn, protect you and others; will not be loose after being installed
  • Size Information: Use as bike horn for adults; bike horns for adults loud is very easy to install on any kinds of bicycle; Handlebar diameter - 2.22 cm(0.87")
  • Loud bike horn: Use as small bike for kids, loud bike horn; Clear the way with a distinctive honk by squeezing the rubber ball on the horn, the sound would takes attention from others
  • High Quality Horn: Bike horn bell is made of a sturdy aluminum alloy; Rubber ball of the horn is made of flexible rubber; This classic retro bicycle bell is universal for many vehicles, such as Golf Carts, Boats, Bicycles
No. 10
YehVeh 3 Pack Toddler Balance Bike Bell Toddler Tricycle Bells Kids Bike Horn Bugle Horn Retro Clown Air Horn for Baby Balance Bike Red Rider Trike No Pedal Push Bicycle Girls Bike with Training Wheel
  • Package: 3 PCs Different Colors(1*Black+1*Yellow+1*Red)
  • Size: 6.1*2.7 Inch/15.5*7 Cm
  • These were part of company Halloween clown costumes as noisemakers!
  • This model is a plastic horn car bell. The body of the car bell is made of plastic, and the kneading body is vinyl, which is of good quality. When you squeeze and release the kneading body, it will make a loud sound.
  • The new design and stylish, durable, weather-resistant chrome-plated steel look great on the bike and look great.
SaleNo. 11
Marine Safety Air Horn, Very Loud Handheld Fog Horn, Mini Compressed Can 1.4oz for Boating and Walking Safety 1.4oz
  • LOUD, POWERFUL SOUND BLAST & COMPACT SIZE IDEAL FOR EMERGENCIES: Airhorn emits an attention-grabbing loud blast of sound. Its small size makes it the perfect fog horn alarm for boating, biking or to carry when hiking, jogging walking or camping.
  • SMALL PORTABLE ALERT FOR SAFETY & DISTRESS: This premium hand held small air horn can is small enough to carry in your mini pocket when walking to use for safety or at graduation and is also easily stored on a boat, jet-ski, dinghy, kayak, or canoe
  • MEETS U.S. COAST GUARD REQUIREMENTS, HEARD FROM 1/2 MILE AWAY! Our Marine Air Horn for Boats meets requirements for boats up to 65 feet/20 meters. Don't let the small size fool you! The very loud air horns blast blow travels a half a mile away!
  • MADE IN THE USA TO STRICT STANDARDS: Our boat air horn can is made here in the USA to tested, trade-secret standards. Don't risk your or the safety of others by buying other loud noise makers for safety or portable air horns for sale from overseas!
  • WHY BETTER BOAT: We are a family owned American business committed to making premium quality boat and RV care and cleaning supplies. We stand behind your satisfaction and our products including our air horn.
SaleNo. 12
LESOVI Electronic Bike Horn 120db Cycling Electric Bicycle Horn 4 Sound Modes with Rechargeable Battery Waterproof Bicycle Bell for Kids Boys Adults Mountain Bike/Adjustable (E-BIKEBELL-Black)
  • Safety First : This Loud Volume & Mini Size Electric Bike Horn can reach 120 db which is loud enough to alert anyone or even people in a vehicle to your presence. Perfect bicycle accessories for you or your kids.
  • Environment-friendly : Instead of using normal battery, the little scooter horn is powered by a rechargeable battery. It can 2000 times with a full charge, which is enough to work 20-30 days.
  • Durable with full protection : IP65 level waterproof + Anti-dust + Shatter-resistant. Fully satisfy your outdoor cycling needs.
  • st to install and quick release : easily mounted and secured with the stretchable straps. No tools needed. You can install or uninstall it on your bike handle bar within 20 seconds.
  • Separate Switch Design: Control switch and bike horn are separated. You can install the control switch right next to your thumb, which can keep you hand still on the bar when you press it. Keep it safe cycling.
SaleNo. 14
3 Piece Kids Bike Horn Air Horn Clown Bicycle Horn Plastic Scooter Bike Bell for Cart Kids Boys Girls
  • 【Exquisite Workmanship】This bicycle horn is made by strict production process, with smooth surface, and will not cut your hand. You can use it with confidence.
  • 【Advantages】This cycle hooter is very easy to install, effectively saving your time and energy, and providing you with a good use experience. Suitable for bicycle handle with proper size.
  • 【High Quality Material】It is mainly made of high-quality plastic material, which is not easy to damage and can be used for a long time. You just need to quickly squeeze the rubber ball and release it to make a sound.
  • 【Function】Unique design makes your bike more attractive. It is a beautiful and practical bicycle accessory. It makes a loud sound to let passers-by notice and keep a safe distance.
  • 【Package Included】You will receive 3 kids bicycle horns. Compact and portable, it will not interfere with your riding. It is an ideal tool for people who like cycling.
SaleNo. 15
3 Pcs Bike Horn Kids Air Horn Clown Horn Hand Held Plastic Scooter Bicycle Bell for Cart Kids Boys Girls
  • High-Quality Material: Our manually operated bike horn, including a clown horn, is crafted from plastic, repeated use. This makes it perfect for both kids and adults who appreciate a good laugh.
  • Exquisite Workmanship: Our clown horn, whether hand-held or bike-mounted, is a result of meticulous craftsmanship. It boasts a playful and eye-catching design that's bound to make people smile and capture their attention.
  • Easy to Use: Squeezing the rubber bulb quickly and releasing it produces a sound that's as funny as it is loud. This user-friendly design adds a touch of humor to your biking experience, making it enjoyable for both kids and adults.
  • Package Included: With your purchase, you'll receive not just one, but multiple horns, including a funny bike horn and a classic clown horn. They are lightweight and suitable for various applications, from bikes to pranks.
  • Enhanced Fun and Safety: Our clown and bike horns aren't just for humor; they can also enhance safety. Whether you're using them for laughs or as an alert device, these horns are designed to grab attention and ensure safety on the road or during playful moments.
SaleNo. 16
Modengzhe Bike Bugle Horn Retro Clown Horn Metal Air Horn with Squeeze Bulb for Bicycle Golf Cart, Red
  • [PACKAGE]1 x Red Bicycle Squeeze Bulb Bugle Horn
  • [MATERIAL]The cute clown horn is made of metal and rubber material, which is non-toxic, durable
  • [FUNCTION]The bike air horn provides a clear the way with a distinctive honk by squeezing the rubber ball on the horn
  • [INTALLATION]The retro clown horn is built with a metal mount, easily and convenient to fixed the bike handlebar, easy to install and remove
  • [PLEASE NOTICE]There may be a certain size difference (Approx 1-3mm/004-012in) due to the manual measurement, please notice and thanks for your understanding
No. 17
Aoyoho Kids Bike Horn Classic Vintage Snail Air Bugle Horn Metal Squeeze Clown Horn for Vehicles Bicycles Golf Cart
  • Classic vintage snail bugle horn with a distinctive honk by squeezing the black rubber ball
  • Easy to install You only need a screwdriver to easily install or remove the horn from your handlebars
  • Mounting dimensions: Handlebar diameter - 0.87 inch
  • Retro bicycle bell is a soft rubber head, which can make a loud sound by squeezing it lightly
  • This classic 7.4 inches horn is universal for any vehicle as Bicycles;Golf Carts;Boats,;RVs;Motorcycles;etc
No. 18
Flying Horse Delta Air Zound Handlebar Mounted Bicycle Horn – Gas Bike Horn Upgrade
  • The Delta Air Zound Handlebar Bike Horn is one of the loudest bike horns around and the easiest to maintain
  • At 115db, this super loud horn requires no batteries or Co2 cartridges to run. Just use a schrader bike pump to fill the air pressure tank and you're ready to sound off
  • Installation couldn't be easier! With the provided mounting gear, strap the bottle to the top bar of your bike, then mount the trigger to your handle bars and let 'er rip
  • Takes up to 80 psi (5.5 BAR) and lasts over 50 half second blasts per charge
  • Ultra light and super resourceful, be and and be heard with the Delta Air Zound Bike Horn
No. 19
DEWIN Electronic Bike Horn - Horn for Bicycle Loud Bicycle Horn 6 Sounds Super Loud Electronic Bicycle Bell Horn Ring Alarm for 22mm Handlebar
  • 🎺【Clear Sound】: The bike horn is compact, and the sound made by it is very loud and clear, which is practical.
  • 🎺【Special Design for Cycling】: The sound button is very comfortable and sensitive. Press and hold the button to make 6 different sounds, which increases safety of cycling.
  • 🎺【Waterproof and Premium】: The bike horn features the beautiful appearance, meticulous workmanship, and it is life-grade waterproof, so it can also be used in rainy days.
  • 🎺【Easy to Install】: The bike horn can be installed on any bicycles, which is suitable for bicycles with a handlebar diameter of 20-25mm/0.79-0.98in(about).
  • 🎺【Risk-free Products】: We serve you based on the principle of customer first. If you have any questions about the product, please contact us as soon as possible, and we will give you a satisfactory answer within 24 hours.
No. 20
3 Pack Bike Bugle Horn Metal Air Horn Retro Metal Squeeze Bulb Clown Horn Fits Kids Bicycle Handle Bar and Golf Cart (Sliver, Black and red)
  • You will receive 3 pack metal bicycle squeeze bulb bugle horn in sliver, red and black
  • Made of good quality: the horn is made of metal and rubber material and polished, non-toxic, non-fading, non-rusting, weather resistant, durable and does not readily corrode, the rubber ball is soft for using, prevents scratching,you can apply them for long time
  • Easy to use and install: squeezing the rubber ball on the horn then clear the way with a distinctive; to install or remove the horn or the bell from your handlebars only need a screwdriver or remove the horn from your handlebars, will not be loosen after installed
  • Size: horn length is 8 inch/ 20 cm in length, Horn ball is 2 inch/ 5 cm in diameter, horn metal mouth is 2.2 inch/ 5.5 cm in diameter, mounting handlebar is 0.9 inch/ 2.3 cm in diameter
  • Widely application: universal for any vehicles such as normal bike, mount bike, road bike, kids bicycle, golf carts, beach cars, recreational vehicles, clown show, etc.

How to choose a good bike air horns

Does the idea of finding a fantastic bike air horns 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 bike air horns. 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 bike air horns 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 bike air horns 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 bike air horns 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 bike air horns 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 bike air horns 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 bike air horns, 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 bike air horns.

Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting bike air horns 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 bike air horns. 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 bike air horns 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 bike air horns.