DIY Programmable: All keys are programmable. All key functions of a standard Windows keyboard can be set, and complex shortcut combinations can be achieved with a single key. Dual Mode Connection: Supports both wired USB and wireless BT dual-mode connection, with a detachable USB cable for ease of use. Knob Function: Can be rotated to adjust and also used as a button. The knob can be used to set zoom, pause, playback, and other functions. Small and Portable: Compact and portable, you can carry it with you, effectively saving desktop space. Wide Applications: Suitable for offices, gaming, music, media, industrial control, laboratories, production line testing, and other fields. Item Type: Mechanical Gaming Keypad Material: Acrylic Key Type: 9 keys mechanical keyboard, 2 x rotary knob (the knob can be used as a button to press) Applicable Equipment: Computer Universal Battery Type: Built-in 200mAh lithium-ion battery 1 x Mechanical Gaming Keypad 1 x Data Line 1 x User Manual