Features: 1.12 Keys and 3 Knob: Multifunctional 12 keys custom keyboard with 3 adjustable knob, quick custom design help you save the tedious link. 2.Application: This keyboard is portable and suitable for office, gaming, music, media, industrial control, laboratory, production line testing and other fields. 3.Knob Characteristics: Knob can be set to zoom in and out, switch songs, volume plus and minus, pause, play and other functions, which is a good helper to you. 4.Supported Functions: The keyboard supports 2 connection modes, Bluetooth and USB connection. Support up to 18 bit character shortcut key overlay, one key output, easy and fast. 5.RGB Feature: Programmable keyboard with RGB function, a variety of light color adjustable, making you have a good use experience. Specification: Item Type: Programmable Keyboard_x000D_ Material: Acrylic, PCB_x000D_ Application: Suitable for office, game, music, media, industrial control, laboratory, production line testing and other fields_x000D_ Connection Mode: Bluetooth /USB_x000D_ System Support: for Windows, for VISTA, for Linux, for OS X_x000D_ Keystroke Life: Up to 50 million times_x000D_ Light: RGB_x000D_ Type: Dustproof green shaft_x000D_ Key Number: 12 keys_x000D_ Product Size: Approx: L120xW115xH38mm/4.72x4.52x1.49in_x000D_ Current Voltage: DC 5V/1A_x000D_ Operating Temperature: -10-50_x000D_ Battery Type: 1000mAh lithium battery x1 (built in) PackageList: 1 x_x000D_ _x000D_ ProgrammableKeyboard 1 x USB Cable 4 x Rubber Pad Note: 1. Bluetooth wireless 15 minutes no operation will automatically enter the hibernation mode. In the hibernation time, click the keyboard "button 1" to wake up. Wake up time about 2 seconds to complete, and automatically connected._x000D_ 2. Battery life, fully charged, normal use of about 1 month, charging time, the indicator light is "red" light, full indicator light is "green" light._x000D_ 3. Layer function switch, press a layer button, switch a layer, after the power failure will automatically remember the current layer. Warm tip: This software can only run on Windows system for the time being, try to download on the computer PC _x000D_ 4. The output of a single letter is the normal factory settings, open the custom software to redefine the function of the keys._x000D_ 5. Set the software does not need to install, open can run directly, set up will be automatically stored on the chain disk, and then inserted to support usb protocols such as for Linux, for OS X and other systems to use (the first run note that antivirus software to release, set to trust files)!_x000D_ 6. Software download problems, please consult customer service, customer servicewill help you solve!