Specification Controller: pic MCU Interface: microUSB Protocol: USB HID Keys: 2 * CherryRGB switch 3 * mini metal switches Backlight: adjustable Program: Compatible with .net4.0 ,Win7 / 8 / 10 integration, Xp need to install software You can use this program to modify all settings for the keyboard Keyboard switches can be replaced without tools Size:50*50*12mm Package include 1 * keyboard 4 set * Switches 2 * OSU keycaps 1 * Anti-slip film 1 * 1M USB cable 1 * Black Packing Box Please contact seller ask for the software