Image of mouse LED on Wheel 3

LED stands for Light Emitting Diode and in an optical mouse, that’s what makes the little red glow under and around the mouse. The sensor of an LED optical mouse uses the LED light to track the movement of the mouse. LEDs also provide style and backlighting for buttons.

RGB refers to a color model consisting of Red, Green, and Blue. In terms of mice, an RGB system usually refers to a mouse that can change the colors on it to change up your style. The CM Storm Recon mouse, for example, allows you to change the glow colors on the top of the mouse to red, green, or blue glows.