Features 1Customizable Function: This mini keyboard is designed with 6 keys and 1 knob that can be customized at your will, improving the flexible operation of work and games. 2Red Switch: This programmable keypad adopts mechanical structure and red switch, which ensures more sensible key feedback and longer service life. 3Ergonomic Design: This gaming keypad also features ergonomic design which can fit for the palm curve, reducing hand fatigue. 4Widely Compatible: This mini mechanical keypad is suitable for Win, for Vista, for Linux, for OS X Laptop. Easy and convenient for connection. 5Durable ABS: This 6 key keypad with knob is made of premium durable, waterproof and dustproof ABS material. Specification Item Type: Mini Keypad Material: ABS Key Type: Red Switch Mechanical Keypad (Knob Can Be Pressed for Programmable Function) Supported Operating System: Suitable for Win, for Vista, for Linux, for OS X Laptop. Package List 1 x Mini Keypad 1 x USB Cable