This is a mini keyboard with custom functions, plug and play without driver. One-click to achieve complicated and complex combination shortcut keys. The operation is simple, and there is no conflict when connecting multiple keyboards, which is convenient and easy to carry. The knob can be set to volume plus or minus, pause, play and other functions. It is suitable for office, game, music, media, industrial control, laboratory, production line testing and other fields. Application: Suitable for office, game, music, media, industrial control, laboratory, production line testing and other fields System Support: For Windows, for VISTA, for Linux, for Macos Button Life: Up to 50 million times Multifunction Keyboard KNOB FUNCTION: It can be defined as multimedia key mode to adjust the volume of the computer plus or minus, and press in the middle for mute, also it can be defined as normal key mode, which means it can be defined as any key of the computer keyboard. KEYS FUNCTION: Each of the six keys can be defined as any individual key on a computer keyboard, or any combination of keys. PROGRAMMABLE KEYPAD: All keys can be programmable. You can set all the key functions of standard Windows keyboard, a key to achieve the complex combination of shortcut keys.(The custom programmable key functions include regular 104 buttons, 8 web navigation buttons, 8 multimedia shortcuts, keyboard locks, Windows locks, etc.) STORAGE FUNCTION: One-Handed Mechanical keyboard with storage function, set up on the Windows system can be used on systems that support usb protocol such as Linux, MacOS, etc. After keyboard keys be set up, it can be stored in keyboard, and no need reset the keyboard even replace the computer. MINI PORTABLE KEYPAD: 102x57x38mm/4.02x2.24x1.50in, mini size and portable, effectively saves desktop space. Detachable USB cable. You can connect the small keypad (plug and play) and a another keyboard with the same computer at the same time, they will not interfere with each other. KNOB FUNCTION: The knob can be set to zoom in and out, cut the song on a song, the next volume plus, volume reduction, pause, play and other functions, the One Handed Macro Mechanical Keyboard is simple operation, convenient and easy to carry. WIDE APPLICATION: Mini keypad suitable for office, games, music, media, industrial control, laboratory, production line testing and other fields, a good helper for so many other types of users including designers and video editors. Specification: Item Type: Mini Keypad Material: Acrylic, PCB Current Voltage: DC 5V/1A Operating Temperature: -10°C-50°C Size: 102x57x38mm Package List: 1 x Mini Keypad 1 x Type-C usb Charger