3" Trackball Assy With RGB Red Green Blue Illumination This trackball changes color while you play! Add a dramatic effect and attract more attention to any game. 3" diameter diffused ball to provide uniform illumination of the ball. 4 Ultra bright multi-color RGB LED's pre-programmed with 4 unique patterns and 8 different color combinations. Patterns - Solid, Chase Pattern 1, Chase Pattern 2, Color Fade & Then Color Change. Colors - Red, Green, Blue, Yellow, Orange, Purple, Light Blue, Light Purple. Patterns & Colors easily selectable via switch on bottom of trackball. Supports up to three buttons. (Three-button functionality will require the use of a driver that supports three buttons. The standard MS driver supports only two, and the MAC OS supports only one). Durable black polycarbonate plastic material. Exceptional performance and precision is achieved from harden steel shafts. Standard AMOA harness included. Please note that the LED requires a power source. There are two power options: 1) 11-2801-00 is a harness that will allow you to tap into the power supply or 2) 20-0414-10 which is a stand-alone power supply.