Features: Adopts a new ice porcelain refrigeration technology,instantly reduce the temperature in one second, providing you a better gaming or watching experience, can also extend the life of battery. High-efficiency fan, for turbine silent duct, super silent design without any annoying noise. Stretchable soft silicone back clip , stable and tightly cliped with phones, protect your machine from scratches and drop. for Creative cool appearance design and beautiful appearance heat raditor with colorful atmosphere light, width within 8.8cm/3.4" mobile phone compatible, suitable for playing games, watching movies, etc. Compact in size, easy and portable for you to carry or store in your pocket. Specifications: Material: ABS+Zinc Alloy Length: Approx. 7 for cm/2.75 inches Color: Black/Silver (Optional) Cooling Method: Semiconductor+Wind Power Cooling Cooling Area: 38 Square Centimeters Power Type: Plug-in How to Use: Back-clip Type Package Includes: 1 Piece Mobile Phone Heat Radiator note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.