You can customize the button to achieve keyboard function, mouse function, multimedia function, character string function, game function and macro definition function. USB+BT4.0 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 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: MK321BT Key number: 3 Connection mode: USB+BT4.0 Mechanical switch: Blue switch Interface type: Type-C Service life: 50 million times Battery capacity: 140mAh Working voltage/current: 5V@15mA Item size: 7.5 X 3.7 X 2.8cm /2.95 X 1.46 X 1.1in Item weight: . 29g /1.02oz Colour:White Material:plastic Size:75 x 37 x 28mm Package Contents: 1 x Keyboard 1 x Data cable 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.