NewHail’s 120mm USB fan solves a simple, common problem: hot electronics. It’s a universal cooling tool for the gadgets that get forgotten until they start throttling or overheating. The value is in its straightforward application and quiet operation.

At 5V USB power, it draws minimal juice from any port, laptop, or wall adapter. The three-speed controller is the crucial feature. Low speed provides near-silent background ventilation for a media cabinet. Crank it to high when your router is under heavy load or your DVR feels hot to the touch. The 120mm size moves a useful amount of air without the whine of smaller fans.

It’s not a replacement for a high-static-pressure PC case fan. The airflow is broad and gentle. Mounting requires some ingenuity, as it typically relies on the included screw holes and your own zip ties or double-sided tape. For the price, it’s a remarkably effective piece of preventative maintenance for a dozen different devices.