You can customize the button to achieve keyboard function, mouse function, multimedia function, character string function, game function and macro definition function. USB Wired+2.4G Wireless dual-mode connection, easy to switch according to your needs. Designed with mechanical blue switches, strong paragraph sense, crisp sound. The button curve fits ergonomic design, comfortable to type. With anti-slip pads at the bottom, no need to worry about keyboard slipping. This product provides key definition setting software based on system, which can be used in various systems after setting.(Note: If you use Linux or , you need to set it up on first, then plug the foot switch into your device and run it to use) Wide application, suitable for office, game, multimedia, etc. Note: -click open/start function cannot be used in wireless mode. Type: Mini keyboard Model: MK321G Key number: 3 Connection mode: USB+2.4G Wireless Mechanical switch: Blue switch Interface type: Type-C Service life: 50 million times Working voltage/current: 5V@15mA Setting software download address: https://..cn/certificate?_l=zh_CN Instructions for use: You need to download and install the settings on the computer first. To change the key value, you must first connect to the computer with a wire and use the software to change it, and then pair the device with 2.4G to use it. Colour:Black Material:ABS Package Contents: 1 x Keyboard 1 x Data cable 1 x 2.4G receiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.