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. 1 x Mini Keypad1 x USB Cable 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 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin