Specifications Battery Included:Yes High-concerned chemical:None Hall Effect:Yes Trigger Button Type:Hall-Linear Compatible Platform:Nintendo Switch Package:Yes Interface Type:Bluetooth,2.4G Compatible Nintendo Model:Nintendo Switch,Nintendo Switch OLED,Nintendo Switch Lite Compatible Brand/Model:Nintendo Origin:Mainland China Type:Gamepads Certification:CE Multiple Connection Modes: the controller supports 2.4G Wireless, Bluetooth, and Switch connection modes, providing versatility in connecting to different devices like PC, Switch, Android, and iOS Dual Hall Effects: Equipped with dual Hall effects, including Hall triggers and Hall joysticks, the controls are more precise and avoid drift in games Programming Function: The PR and PL keys are programmable. By default, they correspond to the A and B buttons on the controller, respectively.Press and hold the SET button for 3 seconds. This will cause the back button to enter programming mode, with the mode light flashing rapidly. Then, select the desired key, such as L (multiple keys can be entered, up to 30, and the same key can be pressed repeatedly). Then, press the Ma key again (Ma = PR, PL). The indicator light will return to the channel indicator, with Ma performing the L function.