Razer Mamba Wireless Gaming Mouse (2012 Edition)

  Gaming Grade Wireless Technology 
  Unrivalled gaming grade wireless technology means the Razer Mamba performs   as well cordless as it does corded, giving you utter freedom of motion whilst     you win gloriously in games. With a 1ms response rate, your command gets       executed first even if you and your opponent react at the same time.

  4G Dual Sensor System 
  Experience a new standard of gaming precision with the 6400dpi 4G Dual           Sensor System, outfitted with a laser and an optical sensor to accurately         calibrate the mouse to any surface for exceptional pinpoint tracking. The           Razer Mamba can not only match the speed of your swipes, but also allows       configuration of cutoff distance to manage liftoff tracking, empowering you       with more control than ever, no matter the play style.

  Improved Battery Life and Charging Dock 
  The Razer Mamba has 15% more battery life than its predecessor, letting you     game unwired for longer. When you need to recharge, just pop it on the sleek   charging dock which also acts as the wireless receiver unit.