1、9 Keys and 3 Knobs: This mini gaming keypad is designed with 9 keys and 3 knobs. Featuring RGB backlit and dustproof blue switch. 2、Knob Function: This programmable keypad has 3 knobs that can be set to zoom in and out, following song, the volume up, volume down, pause, play and other functions. 3、Multi Function: This mini keypad possesses programmable function, storage function and delay function. Type C to USB interface, plug and play without driver. 4、Delay Function: This 9 key gaming keypad also has delay function that can be set to a maximum of 6000 milliseconds. 5、Wide Application: This 9 key keypad with 3 knobs is suitable for office, games, music, media, industrial control, laboratory, production line testing and other fields. 1 x Mini Gaming Keypad1 x USB Cable Item Type: Mini Gaming KeypadMaterial: Acrylic, Printed Circuit BoardApplication: Suitable for Office, Games, Music, Media, Industrial Control, Laboratory, Production Line Testing and Other FieldsSystem Supported: For Win, for Vista, for Linux, for OS X LaptopKey Life: Over 50 Million TimesLight: RGB BacklitSwitch: Dustproof Blue SwitchNumber of Key: 9Current and Voltage: DC 5V/1AOperating Temperature: Minus 10℃ to 50℃Product Size: Approx. 120 x 115 x 38mm / 4.7 x 4.5 x 1.5in ( Manual Measurement, Slight Error May Exist )