Full Details on Amazon.com : http://www.amazon.com/gp/product/B009WRFL2Y?tag=tsukuyomi-20

Mad Catz R.A.T.7 Gaming Mouse for PC and Mac

Gaming-grade 6400 DPI Laser Sensor
FPS-style Precision Aim Mode
6 Programmable Buttons 18 User-definable Commands via 3 Modes
Set and toggle 4 Custom DPI Settings per Profile
Lightweight Aluminum Chassis
Custom Weight System AddRemove up to 30g for a Perfect Feel