1、USB and Bluetooth Dual Mode: Automatic switching, plug in USB, switch to USB mode, unplug USB will switch to bluetooth mode. If there is no operation on the wireless Bluetooth for 15 minutes, automatically enter the sleep mode. 2、Programmable Function: A mini keyboard with programmable functions, which can set all key functions on the standard for Windows keyboard, and realize complicated and complex combination shortcut keys with one key. 3、Storage Function: The mini 9 keys keyboard has a storage function, which can be used on systems such as for Linux and for OS X that support the USB protocol after being set up on the for Windows system. 4、Knob Function: The knob can be set to zoom in and out, cut to the previous song, increase the volume of the next song, decrease the volume, pause, play and other functions, which is a good helper for assistance. 5、Application: Type C to USB interface, no driver required, plug and play, and can also simulate a mouse. It is suitable for office, game, music, media, industrial control, laboratory, production line testing and other fields.