Top Optical Sensor - PixArt PMW3360 sensor accuratly tracks up to 250 inches per second and 50g acceleration. 12000 DPI* capable sensor, and 1000Hz polling rate Dpi Adjustable - On-the-fly DPI adjustment button indicated by optional LED Color. DPI preprogrammed for 5 steps: Red 400 / Green 800 / Blue 1200 / White 1600 / Purple 3200 Omron Switches - Omron D2F Series mechanical switches rated for 20 million clicks. Tuned to provide fast and reliable actuation without miss-clicks and accidental double-clicks Ergonomic and Durable - Ergonomic and durable double shell design with two-tone soft touch coating to provide a comfortable grip. Lightweight design at 104g total with a flexible braided cable for extra durability