Iconic Alienware design with AlienFX 16.8M RGB Lighting Optical, Surface calibration capable 5 on-the-fly DPI settings 100-12000 DPI resolution 250 IPS speed 50G acceleration 1000 Hz (1ms) polling rate Omron 50 million clicks Up to 13 all programmable buttons 4 interchangeable side modules 512kB onboard memory Adjustable 3-position palm rest Adjustable four 5 grams weights Braided nylon cable