Item Type: Mobile Gamepad Material: PC+Aliminum Alloy Input Voltage: DC 5V Input Current: 1A-2A Suitable for Mobile Phone Size: Compatible With 4.7-7.2 Inch Mobile Phone 1、Two In One: Handset and semiconductor radiator in one. There are holes on the left and right sides of the handle to charge the phone and plug in headphones at the same time.  2、Good Cooling Effects: This semiconductor mobile game controller adopts semiconductor refrigeration technology, 3 seconds rapid cooling, long term refrigeration. A semiconductor radiator cools the phone by 10‑30°C.  3、Superior Performance: The semiconductor phone radiator keep the phone cool when playing games for a long time to protect the battery, improve the performance of the phone and prevent the game from getting stuck.  4、Convenient to Use: There is a mobile phone holder on the back of the handle, which you can use together with the radiator as a mobile phone holder when you watch video on the phone.  5、Strong Compatibility: The semiconductor phone radiator is suitable for 7‑7.2 inch mobile phones, support most of mobile phones. Two clamps have silicone pads inside, which will not scratch the phone. 6、Plug and Play: USB power supply. As long as there is electricity, the semiconductor radiator can be used continuously for 24 hours without any problems.