1. Programmable Keypad: All keys are programmable. All key functions of the standard Windows keyboard can be set, and a complex combination of shortcut keys can be realized with one key. 2. Mini size, effectively saving desktop space. Detachable USB cable. You can connect a keypad (plug and play) and another keyboard at the same time on the same computer without interference. 3. Wide range of applications: The mini keyboard is suitable for office, gaming, music, media, industrial control, laboratory, production line testing, designers, and video editors. 4. Type-C to USB interface, no driver required, plug and play. Button customization available based on user requirements. Customers can provide setting preferences to customer service or design their own layout. Setting software, video operation instructions, and remote technical assistance are available. 5. Keys can be programmed for complex operations, ideal for office, gaming, music, media, and industrial control. Mechanical key switches, durable. Ergonomic design. Hot-swap support. 6. Compatible operating systems: Windows, Vista, Linux. 7. RGB lighting with three modes: solid color, marquee, off. Setup can be customized upon request. Keys: 4 Knob: No knob on 4 keys Current and voltage: DC 5V/1A Interface: Type-C Switch type: Outemu red switch Product size: 100 x 35 x 30mm / 3.94 x 1.38 x 1.18 inch Product weight: 58-68 grams Note: The 4-key keyboard does not include a volume knob. Operation Style: Mechanical Language: English Type: Wired Application: Laptop Keyboard Standard: Mini Keyboard Interface Type: USB Color: Black Material: Acrylic Package Contents: 1 x Custom Keypad 1 x USB Cable Note: Light reflection and display differences may cause slight color variation between the image and the actual item. Measurement allowance is +/- 1-3 cm.