E-Blue Cobra Type-S 1600DPI Optical LED Compact Gaming Mouse, Pink/Blue (EMS128PK) 4-inches long Mouse designed for Gamers with Smaller Hands Adjustable DPI (Dots Per Inch) switch 400/800/1600 High Performance Chipset possessing 16 G-Force Acceleration Red Wave Sensor operates on most Surfaces including Glass Micro Switch provides Lifespan of up to 3 Million Button Clicks