Feature:1. Programmable Function: This mini keyboard is programmable, designed with knob. Allowing you to freely configure keys and functions, improve work efficiency and comfort.2. Dual Mode: This programmable keypad can be easily connected via USB cable or wireless BT, widely compatible with a variety of devices.3. Red Switch: This gaming keypad adopts mechanical structure and red switch, which ensures quicker response and longer service life.4. Ergonomic Design: This mini mechanical keypad also features ergonomic design which provides easier and more comfortable typing.5. Durable Acrylic: This one handed keypad with knob is made of premium acrylic material, which is strong, durable and resistant to wear.Specification:Item Type: Mini KeypadMaterial: AcrylicConnection: Wired USB/ Wireless BTKey Type: Red Switch Mechanical Keyboard (Knob Can Be Pressed and Used As Programmable Key)Supported Operating System: Suitable for Win, for Vista, for Linux, for OS X Laptop.Battery Type: Inbuilt 800mAh Lithium Ion Battery.Package List:1 xMini Keypad1 x USB Cable