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. 1 x Mini Keypad1 x USB Cable Item Type: Mini KeypadMaterial: Acrylic, PCBPurpose: Applicable to Office, Games, Music, Media, Industrial Control, Laboratory, Production Line Testing and Other FieldsConnection Mode: BT, USBSystem Support: for Windows, for Vista, for Linux, for OS XKey Life: Up to 50 Million TimesLights: RGBType: Dustproof Blue switchNumber of Keys: 9Product Size: Approx. 120 x 115 x 38mm / 4.7 x 4.5 x 1.5inCurrent and Voltage: Dc 5v 1aWorking Temperature: - 10 ℃ to 50 ℃Battery Type: 1000mah Lithium Battery (built In)