Compatible: With a linearly damped expansion , easy to adjust, phone radiator is fit for all types of phones with a width of 6 to 8 cm, used for cooling when connected to a power source. Temperature Digital Display: Phone cooler has a temperature intelligent digital display, you can see the temperature change, plug and play, simple and convenient. Cooling Area: Cooler fan form air to dissipate heat from the battery area and cpu area on the back of the phone, and the three speed cooling can be adjusted according to your needs Dual Semiconductor Cooling Chips: Equipped with dual semi conductor cooling chips, cell phone cooling fan offers gentle and continuous temperature control, preventing condensation. Lightweight: Fan cooler with compact, lightweight design, will not obstruct your fingers operation, suitable for mobile gamers and enthusiasts who use mobile phones to live video.