E-Blue Cobra Advance Wireless LED Optical Gaming Mouse, Black/Silver (EMS609BK) Black with inlaid silver plating soft-touch shell with distinctive blue LED design Adjustable DPI (Dots Per Inch) switch 500 / 1000 / 1800 Avago high-performance optical navigation gaming sensor 2.4G Wireless transmission technology (30 ft. radius) High FPS rate for extremely precise tracking level OMRON Micro Switch provides lifespan of up to 5 million button clicks