Hardware Reviewer Jeremy Star takes a look at the Razer Copperhead mouse, the last part of Razer's "Holy Trinity of MMORPG" gaming.
The Copperhead uses a 2000 DPI laser system to track movement. Laser mice are supposed to be much more accurate, due to the ability to detect minuscule changes in wavelength and translate those changes to movement, but in reality, optical mice are catching up fast. (Well, gaming optical mice, anyway.)
For a slightly more detailed explanation of DPI, and why you want a high one, check out my Razer Krait review.
Aside from having a high DPI, the Copperhead follows suit with Razer's other mice by using the “Always On” technology. This basically means the mouse doesn't ever enter a power saving mode, so it's always ready to translate your wrist flicking in to a deadly, but beautiful Night Elf/ Michael Jackson dance routine. It also shares the 16-bit data path, 1ms response time, and 32 Kb of Razer Synapse memory that other Razer mice use. All that means the mouse translates your frantic movement almost as soon as it happens, and it can port your saved mouse configurations to another PC, so you can bring your mouse with you wherever you go without reprogramming it.
Read the whole article here.