Definition and purpose of USB interface and Type C interface: Type C interface: used for external auxiliary power supply(when large current equipment is not used, auxiliary power supply may not be connected). Instructions for auxiliary power supply: When the USB interface load current is greater than 1A the auxiliary power supply shall be used for power supply. Auxiliary power supply parameters: DC voltage 5V, current 2A Instructions for product upgrade: Enter upgrade mode: press F12+F10+ESC on keyboard simultaneously for 3 seconds, and enter upgrade mode after the page indicator “white light” is on. When this product is used normally, please do not enter upgrade mode, otherwise unable to exit. Entering upgrade mode requires software upgrade before exiting. Playing mode and Setting mode: Switching operation mode and setting mode press F12+F11 simultaneously to switch. Playing mode: use keyboard and mouse to control the game, and the setting indicator”off” indicates the playing mode. Setting mode: set the corresponding controller functions of keyboard and mouse, and the setting indicator “blue light” on indicates the setting mode. Note: To connect the original game controller, after setting keyboard and mouse functions in the setting mode. Switch back to the playing mode to control the game.