1. Programmable Keypad: All keys are programmable. All key functions of the standard 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 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 line 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. 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, . Support ergonomic design. Support hot swap. Available operating systems:for /vista/linux/. Keys:4 Knob:No knob in 4 keys Current and voltage:DC 5V/1A Interface:Type-C Axle:Outeum red switch 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 Interface Type:USB Colour:Black Material:Acrylic Package Contents: 1 * Mini Custom Keyboard 1 * USB cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.