Review on 🌀 Coolerguys 120x25mm 5V USB Rear Exhaust Blower Fan by Tommie Lawson

The fan is a bit noisy, but once the sound comes on in my home theater I don't notice it at all. It's only when the volume is turned off or very, very low that I hear a slight hum. While it doesn't bother me, I can see it being a problem for some. A fan is great if your AV receiver is in a hard-to-reach spot, as it blows the hot air sideways (backwards or in the direction you point the exhaust). not up. I have an Onkyo receiver and they are notoriously hot. Even after many hours of operation, my receiver still feels cool thanks to this fan. I don't mean lukewarm, literally cool to the touch. It just doesn't get warm no matter what I wear. The thing works very well.