?UNIVERSAL COMPATIBILITY?The cooling fan fits 2.71-3.34 inches phones with flexible retractable clamps. The clamps of the radiator are with rubber pads and a stepped design, protecting against scratches and mistouch of the phone. ?QUIET OPERATION?The cellphone cooler adopts a noise-reduction design, < 39db running sound, and allows you to comfortably play games and watch videos. ?COMPACT & LIGHTWEIGHT DESIGN?The mobile games cooler weighs only 74g in a small size, leaving more space for hand operation and being without overheavy burden. ?SIMPLE CONTROL?The phone gaming cooler is with a physical switch for power on/off. Built-in type-c interface, plug-and-play. (Note: The package does not include a power cord.). ?POWERFUL COOLING?The phone cooler adopts semiconductor refrigeration technology, 5 blades ultra-high speed cooling fan (7500 tr/min), and a maximum temperature drop of up to 24?, keeping the cellphone at the optimal temperature.