hi-techreviews.com posted a review on the Razer DeathAdder

The name of the game when you are playing FPS type games is speed and accuracy, the ability to lock onto your target and say get a one-shot kill versus a having to fight the mouse just to acquire a target can make for some very long headaches but very short matches. The crew at Razer has come to your rescue one again with what very well maybe the meanest gaming mouse ever built. This bad boy features the 3rd generation "3G Infrared Sensor Technology" which equals out 1800 DPI. There a bunch of other features but you will need to read the review to find out what they are.

Razer DeathAdder Review