Material: ABS+Aluminum AlloySilent cooling, fast cooling, mobile phones are not hot, no stuck, easy to play games.The spring retractable clamp does not hurt the machine, and mobile phone from 4-7'' can be clamped.The heat is dissipated, the fan is effectively cooled, and the heat of the mobile phone is quickly drained.Lowering the temperature of the phone can prevent the battery from prolonging and prolong the battery life.Package included:1 x Mobile Phone Cooler (Mobile phones not included)1 x LineOnly the content above the package, other products are not included.Note:1. Please Allow 1-3mm Differs Due To Manual Measurement.2. Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. Please refer to the actual product.Thanks For Your Understanding.The measurement allowed error is +/- 1-3cm.