TOOGOO Black USB Wired Optical Light Scroll Wheel Mice Mouse for PC Laptop Computer Bottom and back light up red USB interface (4-foot cable length, approximate) Precise optical technology 800 dpi resolution 3-button design Scroll Wheel (acts as third button) Style and comfort in the palm of your hand PC and Mac compatible Regulatory 3-Button USB Optical Scroll Mouse General Color: Black/Clear Scroll wheel lights up blue USB Interface.