Features: 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. Specification: Item Type: Mini Gaming Keypad_x000D_ Material: Acrylic, Printed Circuit Board_x000D_ Application: Suitable for Office, Games, Music, Media, Industrial Control, Laboratory, Production Line Testing and Other Fields_x000D_ System Supported: For Win, for Vista, for Linux, for OS X Laptop_x000D_ Key Life: Over 50 Million Times_x000D_ Light: RGB Backlit_x000D_ Switch: Dustproof Blue Switch_x000D_ Number of Key: 9_x000D_ Current and Voltage: DC 5V/1A_x000D_ Operating Temperature: Minus 10 to 50_x000D_ Product Size: Approx. 120 x 115 x 38mm / 4.7 x 4.5 x 1.5in ( Manual Measurement, Slight Error May Exist ) PackageList: 1 x_x000D_ _x000D_ Mini Gaming Keypad 1 x USB Cable Note: 1. This software can only be runned on for Win system temporarily, as far as possible to download on computer PC. Setting software is not needed to install, open and run directly, it will automatically be stored in the chain plate set, then insert into for Linux and for OS X Laptop system that support USB protocol.(Note that antivirus software should give green light for the first time, set it as the trusted file)_x000D_ _x000D_ 2. Please contact CS if there's problem with software download.