Features: You can customize the button to achieve keyboard function, mouse function, multimedia function, character string function, game function and macro definition function. USB+2.4G+BT4.0 three-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 Windows system, which can be used in various systems after setting.(Note: If you use Linux or Mac, you need to set it up on Windows first, then plug the foot switch into your device and run it to use) Wide application, suitable for office, game, multimedia, etc. Note: The one-click open/start function cannot be used in wireless mode. Specification: Type: Mini keyboard Model: MK321-Pro Color: Black/White(optional) Key number: 3 Connection mode: USB+2.4G+BT4.0 Interface type: Type-C Mechanical switch: Blue switch Service life: 50 million times Battery capacity: 140mAh Working voltage/current: 5V@15mA Item size: 7.5 * 3.7 * 2.8cm /2.95 * 1.46 * 1.1in Item weight: Approx. 29g /1.02oz Packing list: 1 * Keyboard 1 * 2.4G receiver 1 * Data cable 1 * User manual