Featuring two semiconductor cooling chips, this phone cooler can achieve larger heat dissipation area and quickly cool your phone to prevent it from over heat. Owing to digital display and temperature adjustment function, this phone cooler can show the temperature in real time and protect the battery from the damage caused by quick temperature change. Made of high-quality metal and plastic material, it is firm and durable to use. The length of this product is 11.1cm, the width is 7.7cm, and the height is 2.9cm. The phone cooler comes with a 2.63-3.46 inch (67-89 mm) stable clip, which is compatible with most and for Android mobile devices. With 1/4 interface, it can be matched with universal wheel support, suitable for all kinds of 1/4 screw head and universal wheel refit, and can be used for live broadcasting, camera, holder installation, etc. Item Name: Phone Cooler Material: Plastic,Metal Model: K4 Color: Black, Silver Color Working Voltage: 5V-2A Features: Quick Cooling, Low Noise, Universal Size Details: 11.1cm x 7.7cm x 2.9cm/4.37" x 3.03" x 1.14" (Approx.) Notes: Due to the light and the screen setting difference, the item's color may slightly differs from the pictures. Please allow slight dimension difference due to the manual measurement. Package Includes: 1 x Phone Cooler (Phone Not Included) 1 x Charging Cable 1 x Universal Wheel 1 x User Manual