Luxurious wired ruby red trackball with metallic silver finish in a low profile ambidexterous design for both left handed and right handed users comes with a 150cm usb cable for reliability and optical technology delivers superior precision twist the multi funciton trackball for fast and precise click free scrolling twist the trackball to control music playback and magnification with music and zoom modes keep an eye on which mode you are in and which function is being performed with the o