Razer DeathAdder V2 Gaming Mouse: 20K DPI Optical Sensor - Fastest Gaming Mouse Switch - Chroma RGB Lighting - 8 Programmable Buttons - Rubberized Side Grips - Classic Black,Focus 20K DPI Optical Sensor: Auto-calibrates across mouse mat and reduces cursor drift from lift-off and landing for industry-leading precision. Razer Optical Switches ? 70M Click Durability,3x Faster Than Traditional Mechanical Switches: New Razer optical mouse switches uses light beam-based actuation, registering button presses at the speed of light,Immersive, Customizable Chroma RGB Lighting: Supports 16.8 million colors w, included preset profiles; syncs with gameplay and Razer Chroma-enabled peripherals and Philips Hue products,8 Programmable Buttons: Allows for button remapping and assignment of complex macro functions through Razer Synapse 3,Drag-Free Cord for Wireless-Like Performance: Razer Speedflex cables eliminate the need for mouse bungees, drastically reducing weight and drag for absolute control,