1、Three Connection Modes: Mini keyboard with custom function, support Type C wired, Bluetooth, 4G wireless three ways to connect, can be freely switched, no driver. 2、3 Adjustment Knobs: 3 knob design, the knob has a click function, can be used as a mouse left and right keys. The knob can be set to zoom in and out, cut the song previous, following volume plus, volume down, pause, play and other functions. 3、Programmable: The keyboard is programmable, supports up to 18 characters of shortcut key overlay, one key output, easy to operate, no tedious steps. 4、Supported Systems: Keyboard with storage function, set for for Windows system, can be used on systems that support USB protocol, such as for Linux, for OS X, etc. 5、Applications: Programmable keyboards for office, gaming, music, media, industrial control, laboratory, production line testing, etc. 1 x Keyboard (Ship with Inbuilt Battery)1 x USB Receiver1 x Type C Cable6 x Footpad1 x User Manual Item Type: USB Mini 15 Key KeypadMaterial: Acrylic, ABSColor: WhiteNumber of Keys: 15 KeysSwitch: Mechanical Blue SwitchKnob: 3Connection: Type C wired, Bluetooth, 2.4G WirelessBattery Type: 300mAh Lithium Ion Battery (Ship with Inbuilt Battery)