Feature:1. Knob: 12 key custom keyboard, with adjusting knob, the knob can also replace the mouse click function, convenient for using.2. Compatibility: Mini USB keyboard comes with storage function, which can be set up for Windows and used for Linux, for OS X and other systems.3. Shortcut Programmable: All key functions of the standard for Windows keyboard can be set to achieve complex combination of shortcut keys with one key.4. Compact Size: One handed mechanical gaming keyboard is compact and lightweight, easy to carry, will not take up too much space.5. Wide Application: Mini keypad is suitable for office, game, music, media, industrial control, laboratory, production line testing and other fields.Specification:Item Type: Mini KeypadMaterial: Acrylic, PCBApplication: Suitable for office, game, music, media, industrial control, laboratory, production line testing and other fieldsSystem Support: For Windows, for VISTA, for Linux, for OS XButton Life: Up to 50 million timesType: Dustproof blue switchNumber Of Keys: 12 keySize: Length: Approx. 132mm/5.20in, Width: Approx. 77mm/3.03in, Height: Approx. 38mm/1.50inCurrent Voltage: DC 5V, 1AOperating Temperature: -10℃ to 50℃.Package List:1 x Mini Keypad1 x USB CableNote:1. This software can only be run on for Windows system temporarily, as far as possible to download on computer PC, set the software to install, open the can be run directly, will automatically be stored in the chain plate set, again to support usb protocol such as for Linux, use on for OS X systems (note that antivirus software to release for the first time, set the trust file)!!2. The software can not download, please consult customer service to solve!