Programmable Keyboard with RGB 3 Knob 12 Keys Bluetooth DIY Multifunction Keypad For Office Media Laboratory Item Type: Programmable KeyboardMaterial: Acrylic, PCBApplication: Suitable for office, game, music, media, industrial control, laboratory, production line testing and other fieldsConnection Mode: Bluetooth /USB System Support: for Windows, for VISTA, for Linux, for OS X Keystroke Life: Up to 50 million timesLight: RGB Type: Dustproof green shaft Key Number: 12 keys Product Size: Approx: L120xW115xH38mm/4.72x4.52x1.49in Operating Temperature: -10℃-50℃ Battery Type: 1000mAh lithium battery x1 (built in)