1. Programmable Keypad: All are programmable. All key functions of the standard Windows keyboard can be set, and a complex combination of shortcut 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 and they 't interfere with each other. 3. Wide range of applications: The mini keyboard is suitable for office, gaming, music, media, industrial control, laboratory, production testing and other fields, and is a good helper for many other types of users such as designers and video . 4. Type-C to USB interface, no driver required, plug and play. Button customization, can be set according to customer requirements. The customer can the setting content to customer service, or it can be designed by the customer. We send the setting software, video operation instructions, and can also remote technical assistance. 5. This button can also be used to achieve complex operations, and is a good helper for office, games, music, media, and industrial control.. Mechanical key shaft, durable. Support ergonomic design. Support hot swap. 6. Available operating : for Windows/vista/linux/. 7. RGB lights can three modes, monochrome, marquee, off. You can let the customer service set it up, or you can specify to help you set it up. : 4 Knob: No knob in 4 Current and voltage: DC 5V/1A Interface: Type-C Axle: Outeum red switch Product size: 100 x 35 x 30mm-5cm/3.94 x 1.38 x 1.18-1.97inch Product weight: 58-68 grams Note: The 4-key keyboard has no volume knob. Operation Style:Mechanical Language:English Type:Wired Application:Laptop Keyboard Standard:Mini Keyboard Interf Type:USB color:Black Material:acrylic Package Contents: 1 x Custom Keypad 1 x USB Cable Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.