Note: When you test the keys and find that the M2 key is no any responds, don't worry, it is not broken. It's because that the M2 key is designed compatible for gunfight games to adjust the speed of the joystick, which needs to be used in the V3 software and not every games support this function. In the V3 mode, hold down the M2 button, the joystick will slow down, release the button, the joystick will back to the state. In gunfight games, this function is good, when you pick up the gun to aim, the speed will slow down to help me aim at the target. Description of application: 1. With ergonomic design and comcompatible for table touch feels. 2. With stretch and shrink function, it can stretch and store mobile phones with different lengths between 135-173mm. 3.Via BT 5.0 EDR/BLE connection, the controller can connect to mobile phones and other game consoles ,such as compatible for ps4, compatible for Switch ,PC, etc. 4. Supports ShootingPlus V3 app, which can be downloaded through various mobile application markets. 5. Support Android and Hongmeng HID standard mode, and can play all kinds of games that support HID standard mode. 6. Support systems above Android 6.0 ( ShootingPlus V3 Android mode). 7. Support multiple touch of IOS 10.1 to 13.3.1 systems (shootingplus V3 IOS mode); Support single touch compatible for IOS 13.4 and above systems. 8. Support MFI games compatible for systems above lOS 13.0. MFI games can be downloaded from ShanWan MFi app. 9. PS3/ compatible for ps4/ compatible for Switch game console is supported to play games with BT connection, but there is no gyroscope function. 10. Support BT connection of windows 10 system laptop and play X-Input games. 11. Support USB wired and can play PC PS3 compatible for Switch games. 12. The key is equipped with cool LED backlight. Characteristic parameters: 1.Item name: Retractable Gamepad 2.Color: 8 colors available 3.Material: ABS 4.Weight: 220g 5.Interface type: TYPE-C 6.Connection type: BT 5.0 7.Compatible platecompatible for m: compatible for IOS/Andeoid phone , PC , compatible for ps4, compatible for Switch .Win,etc.Higher Mobile Phone Adaptability 8. Working voltage: DC3.7v 9. Working current: About 10mA 10. Duration:>20h 11. Sleep current: