2Pack Quiet 120mm USB Fan Dual-Ball Bearings, USB Fan 5V, with L/M/H 3-Degree Speed Controller High Airflow Cooling Fan for Router Modem Receiver DVR Xbox TV Box

GREAT! essentially silent at low speed, VERY Quiet at medium, gentle LOW hum at high speed (not apparent a couple feet away). great in a home studio for keeping gear cool. I love the rubber spacing which makes room for airflow from any position of the fan (laying down, standing up, etc.) I added some stress relief to the cord at the fan, since there wasn't any, and it needed some... used a small cable tie and mount. Small velcro straps/ twist-ties would also work used double stick tape to mount the switch - a Small piece, to not block the vent holes at the back of the switch. I wanted the quietest fan possible, and this fit the bill - a 2 pack for a good price for keeping an ATEM / network switches / etc. cool and happy. HIGHLY RECCOMENDED.

works great ...adjustable speeds...does not make crazy noise. i put one under my mini PC, mostly just to get it up off the table does exactly what it says it does.

in my original review i had reported ... One was whisper quiet the other has a low sounding hum. Not terrible , not loud, but I have to run it on low to avoid being annoying. i since realized that the issue was not the fan. i had mounted one to a cabinet back panel to exhaust heat . it seems that somehow the volume of the air or the way it is mounted is creating some type of resonance . it isn't vibration from the fan it is something about the air movement . very odd but both fans are quiet when not mounted to anything even at high speed. but no matter what i did to dampen vibration (because it wasn't vibrating) i couldn't eliminate sound inside the cabinet. i don't blame the fan anymore though I like the usb splitter.

I put these in my entertainment stand to help with airflow for electronics. They are pretty much silent, but don't seem to move a huge amount of air.

These are quality fans. Very quiet. I am an ET, and have been in IT 35 years. Heat is the #1 killer of electronics next to surges. Keeping your equipment cool and clean will give you max life. I had a switch heat issue and the SFP+ ports ran 120°F- 130°F. I bought a double for a 16 port, and 2 singles. Dropped temps 40°. It is actually cool to the touch. I have SFP+ to RJ45 transceivers on the 10G switch backhaul. Thermal pics before and after included. Happy with this purchase. Fast delivery too (overnight). The fans need a USB charger not included. My power supplies have a USB port on them to use.

These are great. Can work individually or together. Very quiet. Nice air flow.

I bought these fans because I wanted to help cool power converters for lithium battery chargers. I have one mounted to the underside of a shelf on an electric skateboard charging station that I built. I have nine 1” holes drilled in the shelf for airflow. The fans are well built, inexpensive and a good deal. Now I’m not using them how they’d typically be, so I don’t have a reference for comparison. On a scale of 1-10 (10 blowing a lot of air), I’d say these are probably a 4. If you were to hold the back of your hand more than a foot away, you probably couldn’t feel anything. They are whisper quiet though. I also like that they have protective grates on both sides so nothing can fall into the blades. I wish they blew a little stronger.

At this point, all of us have internet modems and or routers. If you experience slow downs, or an overheating device, stick this sucker on-top-of or underneath. It will keep it cool. I have been using it for over 2 weeks and used to have to reset my modem daily. 0 resets in 2 weeks!!!

I have been very happy with this fan. At the lowest speed it is nearly silent, and I am very sensitive to sound. I cools my firewall and rpi5 perfectly.

My mni-pc fan is failing, so while waiting to get a new one from China, I got this fan to keep the mini-pc running. Placed it under the mini-pc. It's very quiet and the silicone pads stick very well to the desk and to the mini-pc.

silenziose spostano una bella massa d'aria.

This dual 120mm cooling fan kit was surprisingly good. The fans are 25mm thick, the rubber feet are approximately 9mm tall, and the finger guards are 1mm thick. The fans are DC5V and do not feature PWM speed control. They consume approximately 0.1A each on high. The cable is a single piece from end to end. Swapping the fan would require a soldering iron. The noise level depends on the configuration. For a DB bearing design, the fans are surprisingly quiet on low if given at least 25mm of space on the intake side. In the stock configuration of 10mm breathing room, the fans whirr. The gap on the output side doesn't affect noise as much. At medium and high speeds, the fans have a distinct buzzing noise that DB bearings make. The rubber feet do an okay job of dampening vibration, but they still transmit some into a hard surface and create noise. The fans move enough air to keep laptops cool, even at low speeds and with a restricted intake. The fan grills and feet are attached to both sides. It does not come with a USB power adapter.

Perfect item