3 Color Backlit Keypad (Red,Purple,Blue) With a Breathing cycle function to swap between the colors as well To cycle Between the colors Pres Both "Tab" and "Backspace" on the keypad to switch between the 5 modes (Red,Blue,Purple,Breathing and off) To cycle Intensity of the lights Press and hold "Tab" and either the " " to increase or the "-" to decrease LED lights Product Details: 19 Keys USB Interface with Nano receiver Line Length 1.5m Supports windows 7/8/10/XP/android/imac Keystroke Life Test:More than 10 million