Features: 1.One Handed: 12 keys mechanical keyboard is mini with customization features, Type C to USB interface, plug and play with adjustment knobs for quick customization, minus the cumbersome links. 2.Dual Mode Connectivity: Macro keyboard is dual mode that supports both USB and Bluetooth modes and switches automatically. Connecting to USB will switch to USB mode, unplugging USB will switch to Bluetooth mode. Bluetooth wireless 15 minutes no operation, will automatically enter sleep mode. 3.3 Adjustment Knobs: Programmable macro keyboard is 3 knobs design, the knob click function can be used as a mouse left and right button. The knobs can be set to zoom in and out, with functions such as cut songs, volume adjustment, pause, and play. 4.DIY Programming: Macro keyboard's all keys are programmable, allowing you to set all the standard for Windows keyboard key functions and use one key for complex shortcut key combinations. 5.Widely use: One handed programmable mechanical keyboard can make your work faster and more efficient, and make the gaming experience more comfortable for office, gaming, music, media, industrial control, laboratory, production line testing. specification:Item Type: Mini Macro Mechanical Gaming Keypad Material: ABS Number Of Keys: 12 Keys Axis: Red Axis Connection Method: Wired, Bluetooth Battery Type: 300mAh Lithium Ion Battery (Built In) Applicable Devices: Computer Universal PackageList: 1 x Keyboard 1 x Charging Cable