Feature: 1. Mini Keypad: Multi function 9 key customized keyboard with 3 knobs, support for up to 18 character shortcut key superposition, one key output, more convenient. 2. Dual Mode: Dual mode keyboard, supporting USB and BT connection modes, and automatic switching. BT wireless will automatically enter the sleep mode after 15 minutes of inactivity. 3. 3 Knobs: The knob has a click function, which can be used as the left and right mouse buttons. The knob can be set with zoom in, zoom out, pause, play and other functions. 4. Multifunctional: The delay function can be set up to 6000 milliseconds. With RGB function, various light colors can be adjusted. With storage function. 5. Applicable Scene: Applicable to office, games, music, media, industrial control, laboratory, production line testing and other fields. Specification: Item Type: Mini Keypad Material: Acrylic, PCB Purpose: Applicable to Office, Games, Music, Media, Industrial Control, Laboratory, Production Line Testing and Other Fields Connection Mode: BT, USB System Support: for Windows, for Vista, for Linux, for OS X Key Life: Up to 50 Million Times Lights: RGB Type: Dustproof Blue switch Number of Keys: 9 Product Size: Approx. 120 x 115 x 38mm / 4.7 x 4.5 x 1.5in Current and Voltage: Dc 5v 1a Working Temperature: - 10 ℃ to 50 ℃ Battery Type: 1000mah Lithium Battery (built In). Package List: 1 x Mini Keypad1 x USB Cable Note: 1. BT wireless 15 minutes without operation, will automatically enter the sleep mode. Click "Key 1" to wake up while sleeping. Wake up time, about 2 seconds to complete, and automatically connected. 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. 3, layer function switch, press the button of one layer, switch one layer, the current layer will be automatically remembered after power failure. This software can only run in for Windows system for the time being, try to download it on the PC. 4. Output a single letter is the normal factory setting, open the custom software to redefine the key function. 5, the setup software does not need to be installed, open can be directly run, set up after the automatic storage in the chain disk, and then inserted into the support of usb protocol such as for Linux, for OS X and other systems for use (the first run attention to antivirus software to release, set as a trust file)