Are you trying to find usb powered fans 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 usb powered fans 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 10 hours of research and did 24 usb powered fans 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 usb powered fans you can buy today
- Classic Design & Small Size: Classic design and more compact, less than 8 ounces, take up small space; it's very suitable for home, car, office, outside or traveling
- Quiet Operation: The fan is very strong and the noise is less than 50dB even when a strong wind is provided; at work and rest, this is a good friend who is quiet and comfortable for you
- Three-Speeds Setting: Low/medium/high-speed setting; press the power button repeatedly to adjust the appropriate fan speed
- Adjustable Wind: The fan head can rotate vertically from 0 to 30 degrees, providing the most suitable angle wind to quickly cool you down
- High Compatibility USB-powered: Small desk fans powered by USB to save energy and are compatible with PC/laptops, mobile power supplies, AC adapters, car chargers, and other power supplies that support USB
- 【Powerful Wind & Low Noise】—— This clip fan is built in upgraded brushless motor, small but mighty and feel the airflow 10ft away. The maximum working decibel is just 40db, it will not disturb you at all when you are working or sleeping.
- 【Strong Grip Clamp】—— Easily clip on to any surface, even running upside down and still be adjusted to point in every direction. This personal fan comes equipped easy-to-open clamp, which can clip on objective of thickness within 2.5 inches. Moreover, the soft rubber on clamp will never cause any scratch.
- 【High Compatibility USB-powered 】:The Small USB fan is powered by USB Cord and compatible with PC/laptop, power bank, AC adapter, car charger and other USB-enabled power supply.USB fan is energy-saving and environmentally friendly. (Note:This fan does not carry a battery)
- 【Space-saving Design 】——Small compact clip & desk 2-in-1 fan fits into any room corner without taking up too much space, a welcome addition to your bedroom, study, office, etc.
- 【360 Degree Rotation & 18-Month Warranty】—— 360 degree vertical and horizontal adjustment, enjoying the cool air from any directions and keeping you cool all the time. Our provide worry-free 18-month warranty and friendly customer service. Please feel free to contact us if any problems. We’ll reply in 24 hours.
- 【Optimal Airflow】 The desk fan with upgraded DC motor generates airflow up to 16ft/s. 5 premium fan blades produce broader and more balanced airflow as comfort as mountain stream breeze, keeping you calm and cool during steep summers.
- 【Stylish & Space Saving】 As compact as a tablet, this real space-saving desk fan can be placed on the office desk or bedroom nightstand with utmost ease to save limited space. Slim and stylish, this small usb fan will embellish your space to the next level.
- 【Personalized Cooling】 From soft breezes to strong winds, this mini usb fan offers 3 speed levels to cool your body and soothe your mind whenever you need it. You can always get the comfort just right for you.
- 【Quiet at all Speed】 Acoustically constructed airflow systems greatly decrease motor and fan noise down to 30dB. This compact desk fan also adopts aerospace fluid dynamics technology to provide ultra quiet cooling at all speeds.
- 【Sturdy yet Stable】 The triangle-shaped structure and rubber pads will achieve better stability to keep the personal fan in place at all times. 220°pivoting fan casts cool breeze to wherever you want for optimized and efficient performance.
- Ultra-quiet UL-certified USB fans designed to cool various electronics and components.
- Features a multi-speed controller to set the fan’s speed to optimal noise and airflow levels.
- Dual-ball bearings have a lifespan of 67,000 hours and allows the fans to be laid flat or stand upright.
- USB plug can power the fan through USB ports found behind popular AV electronics and game consoles.
- Dimensions: 3.2 x 3.2 x 1 in. per fan | Total Airflow: 52 CFM | Total Noise: 18 dBA | Bearings: Dual Ball
- USB Powered: This is a plug in USB fan, the 4.9 ft USB cable is compatible with all USB port, such as computer, laptop, power bank, USB socket, wall charger. NOTE: No wall charger included
- Small Size: The mini fan is 14.5*15*5 cm/5.7*5.9*2 inch in size and 6.3 oz in weight, the diameter of fan head is 13 cm/5.1 inch. This is a lightweight personal fan, space-saving on desk and easy to carry around
- Speed Adjustable: The portable fan has three speeds to meet different cool needs, press the button on the back to operate. With five fan blades, the electric fan can provide powerful wind to cool you down quickly
- Practical Design: This small table fan can rotate 360 degree up and down, free to direct the airflow where you want. The non-slip base ensures the usb fan can keep stable on desk and decrease noise when use
- Wide Application: Need a little fan for office? No more space on desk? We recommend TriPole mini desk fan! It’s ideal for home, office, bedroom, also portable to take outside (need power) for travel, camping
- Notice Before Purchase: This is a USB desk fan, it needs to be plugged in to work, the usb cord cannot be removed
- 【The Mightier】Adopting a newly upgraded arc-shaped air turbine design and supercharging technology, it provides longer service time, and brings strong airflow, to bring you a better cooling experience.
- 【The Quieter】The 2025 upgraded silent construction design provides stronger airflow while being 25% quieter than other desk fans for your maximum comfort. Better accompany your work or sleep without disturbing you.
- 【Stepless Speed Regulation】Turn the knob and enjoy wind from gentle to strong, or any speed you want in between. More speed options will meet your needs in different scenarios, allowing you to find the perfect coolness.
- 【Compact & Portable】AaoLin small portable fan is compact and easy to carry. You can put it in your backpack, handbag, so you can enjoy coolness anytime and anywhere. Perfect for use in home, car, office, desktop, camping, or travel.
- 【High Compatibility USB-Powered 】 The AaoLin desk fan is powered by USB Cord and compatible with computer, power bank, power adapter and any other USB-enabled power supply. (Note:This fan does not carry a battery)
- 【Exquisite Design】ONLY 6 oz! Compact lightweight design for maximum convenience. Small and lightweight personal fan provides cooling air circulation in any desired directions with 360 degree tilt rotation.Perfect for use in home,car, office, desktop, camping, or travel.
- 【Ultra-Quiet】The small usb desk fan uses a silent structure which is engineered to be ultra-quiet while delivering high airflow. Better accompany your work or sleep without disturbing you.
- 【Three-speed Adjustable】 Low/medium/high speed level. Adjust appropriate fan speed by pressing the power button repeatedly. Third gear which can be variable speed design provides you more choices in different temperature environment.
- 【High Compatibility USB-powered 】The SmartDevil USB fan is powered by USB and compatible with PC/laptop, power bank, AC adapter, car charger and other USB-enabled power supply.USB fan is energy-saving and environmentally friendly. (Note:This fan does not carry a battery)
- 【Customer Service】Provide free online customer service. We promise to answer within 24 hours . If you have any questions, please feel free to contact us, we are willing to answer your questions.
- USB or Rechargeable Battery Operated: The clip-on fan has a 2000 mAh battery that can last from 3.5/6/10 hours(Depending on speeds), can be used while charging; suit for desks, strollers, camping, car seats; your beach/camping/travel essentials
- Strong Wind & Low Noise: Built-in powerful brushless motor, has a long service life; fan blades and fan cover have been upgraded according to the principle of aerodynamics, which can support powerful airflow but also make the fan operate quietly
- Also Safe for Baby: The mini clip fan only has 5.5mm gaps, so it will protect the infant's little fingers from entering; While keeping toddlers safe, still works quietly and provides powerful wind
- Strong and Durable Clip: This personal fan comes equipped easy-to-open clamp, which can clip on a thing of thickness within 1 inch; The inner side of the clip is equipped with a sponge pad that will not cause scratches while clipping something
- Mini Size with Rotation Design: 360° of horizontal rotation and 360° of vertical rotation, The mini fan is only 5.11*1.54*6.77inch and 0.71lb, Not only easy to carry but also saves space
- Multi- Function Fan: The portable fan and the clip go hand in hand that certainly means you can position or hang the fan at any of your desirable places, whether it is a desk, golf cart, treadmill, or even use it outdoors especially for camping
- Quick Recharge yet Long Lasting Battery: This battery fan comes along with a 10000 mAh battery. It has the potential to operate for an entire day with a full charge. With its USB-C port and micro USB port, it offers 10W charging speed. Thus the fan gets charged 50% faster. It gets fully charged within only 6 hours
- Robust Airflow with Low Operational Noises: The operational noise ranges from 20 decibels to 40 decibels for the minimum and maximum wind speed mode respectively. The quiet airflow is paramount when it comes to clipping it on bed side, ensuring that your family enjoys sleep without any disturbance
- Compact Size: This rechargeable fan is equipped with a robust clamp. You can easily place it at a corner of your desk, beside your treadmill, in your golf cart, besides your bed, or anywhere you like to have strong airflow. Its compact size doesn't take up much space
- High Rotational Capability: The highly portable and durable fan is capable of a 360° manual flip on the vertical side to make sure that there is no dead corner, and every person sitting beside it enjoys its cool breeze
- 【12cm USB Fan】: USB cooling fan, perfect for cooling various electronics and components, noise only 23dB (Low Speed) while working.
- 【L/M/H Speed】: A speed controller is specially designed to control the airflow level. Meet your different needs.
- 【High Quality】: Dual ball bearing have a lifespan of 45000 hours, 7 blades generate strong airflow to keep the cabinet stay cool.
- 【Place Anywhere】: can be laid flat or stand upright. Great for narrow space: Laptop, receivers, AV electronics and game consoles...
- 【Full Protection】: Aluminum grill on both side protect your hand or prevent damage cord when operating.
- 【3 Speeds Strong Wind】Cooling experience with 3 wind speeds, easy to enjoy with one button. From silent breeze to super strong hurricane, to meet your more diverse cooling needs. Ideal for enjoying a cozy and peaceful summer.
- 【Powerful and Quiet】The 2023 upgraded silent construction design provides stronger airflow while being 25% quieter than other desk fans for your maximum comfort. Better accompany your your work or sleep without disturbing you.
- 【360° Rotation】360° free rotation adjustment, blowing cool airflow to any part of the body. Easily adjust the angle you need and enjoy all-around coolness. (Anti-slip Silicone Base, Reduce Noise and Vibration)
- 【Compact & Portable】AaoLin small portable fan is compact and easy to carry. You can put it in your backpack, handbag, so you can enjoy coolness anytime and anywhere. Perfect for use in home, car, office, desktop, camping, or travel.
- 【High Compatibility USB-powered 】 The AaoLin desk fan is powered by USB Cord and compatible with computer, power bank, power adapter and any other USB-enabled power supply. (Note:This fan does not carry a battery)
- Dimensions (included rubber pad) : 4.7 x 4.7 x 1.4 in. | Airflow: 52 CFM | Noise: 32 dBA | Bearings: Dual Ball
- USB plug can power the fan through USB ports found behind popular AV electronics and game consoles.
- Dual-ball bearings have a lifespan of 50,000 hours and allows the fans to be laid flat or stand upright.
- Non-slip feet give your equipment a little breathing room. Make sure there is ample of space around your devices - about 1-2 inches.If the equipment is stored in an enclosed area, hot air tends to cycle through it making it hotter and hotter the longer it is running.
- ⭐[ANEXT]⭐Every product from ANEXT is designed and manufactured under the highest standards of quality in the industry. We ensure that every box of the ANEXT USB computer fans is carefully inspected before it heads to your doorstep. And as we stand by the quality of our product, please know that you can reach out to us if ever you have concerns with your purchase
- 【Advanced Power Bank Function】 Engineered with cutting-edge technology, our rechargeable fan is powered by a high-capacity 20000mAh lithium-ion battery, ensuring exceptional performance and long-lasting durability. Beyond its cooling capabilities, this fan doubles as a high-efficiency mobile power supply, allowing you to charge smartphones, tablets, and other USB devices seamlessly while on the go. Perfect for outdoor adventures or emergency situations, it combines convenience with reliability.
- 【Precision-Adjustable Wind Speed】 Experience the ultimate in personalized comfort with our stepless speed control technology. This innovative feature allows you to fine-tune the airflow from a gentle breeze to a powerful gust, catering to your exact needs. The fan’s advanced motor system ensures stable and consistent wind speed, delivering uninterrupted cooling for extended periods without frequent recharging.
- 【Smart LED Lights & Energy-Saving Timer】 Equipped with energy-efficient LED lights, this fan offers three adjustable brightness modes, providing optimal illumination for nighttime activities or low-light conditions. The integrated smart timer function allows you to set the fan to automatically shut off after 1, 2, 3, or 4 hours, conserving battery life and ensuring energy efficiency.
- 【Ergonomic & Versatile Design】 Designed with precision and versatility in mind, this fan features a 270-degree adjustable air outlet and a 360-degree rotatable hook, enabling you to direct airflow exactly where you need it. The premium, high-strength materials ensure durability and stability, whether you’re hanging it from a tent, tree branch, or patio structure. Its compact, lightweight design makes it easy to carry.
- 【High-Tech Outdoor Companion】 Crafted for the modern adventurer, this multi-functional fan combines advanced cooling technology with premium build quality to deliver unmatched performance. Give the gift of cool breezes, bright lights, and endless adventures—because every outdoor enthusiast deserves the best!
- Powerful and Super Quiet: The usb desk fan comes with a upgraded motor, makes wind stronger and noise lower; Max wind speed reachs 5.3 m/s, 30-50 db noise level; A great personal fan for sleeping and working (Please powered by a 5 V / 2 A power supply)
- Three-Speed Airflow: The portable fan has 3 modes to get the air flow exactly how you want it: Low, Medium and High; High speed is powerful, moves a lot of air, and cools you off quickly; Low speed creates gental breeze; Great travel essentials for summer
- Detachable Cover and Stable Base: The table fan cover can be easily removed for cleaning; Silicone pads are designed at the 4 positions of the base for better anti-skid effect, so the small fan will not crawl on the desktop or tip itself over
- USB Powered: The small desk fan can run off any outlet adaptor that has USB ports; You could easily plug into power bank, laptop, computer, USB socket, wall/car charger and other USB-enabled power supply (Note: No wall charger included)
- Small Size and Lightweight: Pink travel fan with 5.5 inch body and 0.6 lb weight is compact; 5-feet cord help move the mini fan around your desk; Perfect for home, office, car, desktop, night stand, bedroom, baseball games, camping and travelling
- 【Variety used】 NewHail 12cm USB fan is very suitable for AV receiver/cabinet/game console/PC/laptop/TV box/DVR/router to dissipate heat. Reduce overheating losses of electronic components.
- 【Windy】 Fan with 9 blades, make sure fast and enduring ventilation.
- 【Dual ball bearings】 Durable dual ball bearings have a lifespan of 60,000 hours, and allow the fan to be flat or upright and easy to use. Fan is beautiful and takes up little space.
- 【Convenient】 The fan is suitable for devices with a USB interface, No matter where you are, just plug it in and use it.
- 【Silent】 The noise of the fan work is very low, which is 19 DBA, making the surrounding environment quiet.
- 【2 in 1 USB Cable】 1 Male to 2 Female splitter, so you only need one USB cable to run 2 fans at the same time. 2 in 1 USB cable saving sockets and convenient connection. The two fans can also be used separately without being forced to connect.
- Usb fan flexible neck: 360 degrees of random bending, easily bend it towards to your face and enjoy the cooling
- Mini fan no noise: This small usb fan creates a gentle breeze at only 25.8dB, very quiet
- Usb pocket fan: The fan has detachable blade and thin shade make it easy to put in pocket, you can take it anywhere
- Usb powered fan: This mini fan easily works with your power bank, laptop, computer, USB charger, etc. Compatible with USB 1.0 and USB2.0
- High speed fan: It spins fast providing a pleasant breeze in seconds. Durable soft fan blades make you free of injury
- Ultra Quiet Fan - Unique upgrade blade design engineered to be 25% quieter. The min noise of this desk fan is close to 25db, and the max noise is under 50db.This mini fan is quiet enough but still powerful for a cool breeze, gives you a comfortable work environment. Perfect choice to use while working and studying
- 3 Speeds & Strong Airflow - There are 3 modes of airflow can be adjustable by click the button, Speed 1 (Blue Light): slight wind, 2.2m/s, 1600rpm; Speed 2(Green Light): cool wind 3.2m/s, 2200rpm; Speed 3(Red Light): strong wind, 4.0m/s, 2600rpm
- Battery & USB Powered - This rechargeable fan with built-in upgraded 2000mAh battery, long working time portable fan for camping, traveling and other working. (Speed 1: 16hours; Speed 2: 8hours; Speed 3: 4.5hours.) You can also plug it into power supply for continuous work
- 180°Tilt Adjustable - The backup stand of this table fan can be rotated 180°to adjust the wind angles to meet your need, you will always be comfortable and cool, just customize the angle and enjoy your cooling with this powerful and quiet fan
- Classic Appearance & Compact Size - The small personal fan is with compact size (7.1*5.7*1.4in) and lightweight (0.56lb), the blade size is 4 inches. It is classic color and simple appearance, easy to carry, perfect for home, bedroom, office, desk, beach, camping or anywhere to bring cooling to you
- 3-Speed Adjustable: The desk fan is equipped with 3-speed airflow, Speed 1: soft wind, 3.1m/s, 1500rpm; Speed 2: high wind, 4.0m/s, 2000rpm; Speed 3: strong wind, 4.8m/s, 2500rpm; 3 wind speeds of the USB fan can reach your various cooling demands
- Ultra Quiet: With upgraded motor, the table fan has stronger wind and less noise, max wind speed reaches 4.8m/s at highest speed; The personal fan is powerful and quiet enough to give you a comfortable working and resting environment
- Small & Light Portable Fan: The travel fan size is only 5.5*5.9*2.2in, and about 6.5oz lightweight, so it can be easily carried in your bag for traveling; The cooling fan comes with a 4.9ft long cord, it's great for home, office, dorm, library
- USB Powered Fan: The mini fan is USB powered, you can directly connect by PC/laptop, power bank, AC adapter, car charger or other USB-enabled power supply; Small fan is more energy-saving and more friendly to your electricity bill
- Stable & Easy to Clean: The desktop fan can be tilted 90° to meet your different needs; The wide base is equipped with 4 rubber pads to reduce vibration and prevent the fan from slipping even when it's running at high speed
- Mini & Portable: 16.5 inch/42 cm small ceiling fan, the length of the fan blade is 6.7 inch/17 cm, not big enough. Mini & lightweight, great for cooling small and narrow space. Portable ceiling fan, takes up very little space in backpack and storage room
- USB Plug in Fan: USB powered dc ceiling fan, you can power it by Laptop, PC, power bank, usb charger, wall charger with usb port and so on. Lightweight and portable, easy to carry and use. NOTE: The fan MUST be plugged in to work. NOT RECHARGEABLE FAN
- Remote Control Function: Ceiling fan with remote control, you can choose four wind speed: light, gentle, moderate and fresh breezy. With timing function, no worry about catching a cold at midnight
- Quiet Ceiling Fan: With silent design, this low noise ceiling fan will not disturb sleeping or working. 6 blades to move a decent amount of air and make a lovely cool breeze, enjoy comfortable summer
- Easy to Install: You will get a ceiling fan, usb extender cord and remote control. Just insert the fan blade into the bearing, then connect fan and extender cord, complete! Simple installation within 30s, plug and play
- Wide Application: Great travel fan for cooling or beauty in sunbathing and camping. Small ceiling fan is suitable for hot summer and windless day, also for dormitory bed camping tent rv room, etc. A portable power source is needed for outdoor using
- 【The Mightier】Adopting the 2023 newly upgraded arc-shaped air turbine design and supercharging technology, provide longer service time, and bring strong airflow, to bring you a better cooling experience.
- 【The Quieter】The 2023 upgraded silent construction design provides stronger airflow while being 25% quieter than other desk fans for your maximum comfort. Better accompany your your work or sleep without disturbing you.
- 【Stepless Speed Regulation】Turn the knob and enjoy wind from gentle to strong, or any speed you want in between. More speed options will meet your needs in different scenarios, allowing you to find the perfect coolness.
- 【Compact & Portable】AaoLin small portable fan is compact and easy to carry. You can put it in your backpack, handbag, so you can enjoy coolness anytime and anywhere. Perfect for use in home, car, office, desktop, camping, or travel.
- 【High Compatibility USB-Powered 】 The AaoLin desk fan is powered by USB Cord and compatible with computer, power bank, power adapter and any other USB-enabled power supply. (Note:This fan does not carry a battery)
How to choose a good usb powered fans
Does the idea of finding a fantastic usb powered fans 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 usb powered fans. 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 usb powered fans 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 usb powered fans 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 usb powered fans 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 usb powered fans 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 usb powered fans 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 usb powered fans, 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 usb powered fans.
Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting usb powered fans 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 usb powered fans. 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 usb powered fans 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 usb powered fans.
