Welcome to our store! 1. Customizable: The one-handed keypad can be customized with a total of 4 keys and a knob, each knob can be customized with clockwise, counter-clockwise, and press functions. 2. Dual Mode Connection: The 4-key one-handed keypad supports wired USB and wireless BT dual-mode connection, detachable USB cable, easy to use. 3. Programmable: DIY programmable keyboard, all keys are programmable, you can set it for Windows keyboard standard all key functions, 4-key design, the number of keys is reasonable, suitable for a variety of programming settings. 4. RGB Backlighting: 4-key mechanical keyboard with RGB backlighting for a better gaming experience, you can plug the gaming keyboard (plug and play) and another keyboard simultaneously on the same computer without interfering with each other. 5. Applicable Scenarios: The gaming keyboard is compact and portable, can be carried around, suitable for offices, games, music, media, industrial control, laboratories, production line testing, and other fields. Item Type: USB Mini 4 Key Keyboard Material: Acrylic, ABS Number of Keys: 4 Keys Customizable Knob: 1 Switch: Mechanical Blue Switch Lighting Effect: RGB Connection Mode: Bluetooth Connection Charging Interface: Type C Applicable Models: Computer Universal Battery Type: 300mAh Lithium-ion Battery (Shipped with built-in battery) 1 x Keyboard (Ships with built-in battery) 1 x Type C Cable 4 x Footpad 1 x User Manual Customers are our top priority. If you find any problems with your product after receiving it, such as damage or incorrect quantity, please contact us immediately. We strive to provide you with the best after-sales service.