With buckle design, it is easy to install and use. It is suitable for 4-6.7inch mobile phones with a thickness of about 2.16cm. The cooling fan prevents the phone from overheating when you play mobile games, and can extend the life of the phone and the phone battery. Item Name: Phone Cooler Material: PC, Aluminium Alloy Use Time: 4 Hours Charging Time: 1 Hour Battery Capacity (Rechargeable Style): 300mAh (Included) Input Voltage/Current: 5V/1-2A Speed: 4000rmp Charging Interface: Micro USB Features: Portable, Fast Cooling, Light Effect, Mute Supported Width: 62mm - 85mm/2.44inch - 3.35inch (Approx.) Cooler Size: 8cm x 4.5cm x 2.8cm/3.15inch x 1.77inch x 1.10inch (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: (Phone Not Included) 1 x Phone Cooler 1 x USB Charging Cable