6,400 DPI High Precision Optical Sensor - Offers on-the-fly sensitivity adjustment via dedicated (reprogrammable) DPI buttons for gaming and creative work Durable mechanical switches - supports up to 10 million clicks Rubber knurled scroll wheel for maximum precision - small tactile strokes increase grip and allow for more controlled scrolling in high stake play situations 5 programmable buttons - allows button remapping and complex macro function mapping via Razer Synapse