Low noise operation, does not interfere with voice chat, frequency conversion DC motor, stable wind for better use. The cooler is small and convenient, the size of which is about one third of the size of the mobile phone, make gaming perfect. retractable buckle design, perfect for all mobile phones .; USB direct power supply for long working time. powerful heat dissipation, turbine exhaust technology for quickly dissipating the mobile phone heat. Name: Mobile Phone Radiator Power supply: USB power supply Usage: snap-on Usage: perfect for the mobile phones with sizes from 4-6.7 inch size:7 x 8 x 2cm Material:plastic colour:black Package Contents: 1 x Mobile phone radiator Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.