Razer Lachesis Gaming Laser Mouse  

Equipped with the revolutionary 4000dpi Razer Precision 3G Laser™ sensor, the Razer Lachesis™ gaming mouse takes on the same lethal traits as its namesake that will send shivers down your enemies’ spines. Add 32KB of onboard memory, nine programmable Hyperesponse™ buttons, as well as an impressive 1000Hz Ultrapolling™ with 1ms response time, and you’ve got a formidable weapon in your arsenal of destruction. Victory beckons – move in for the kill.
	4000dpi Razer Precision 3G Laser™ sensor The Razer Lachesis ™ reigns supreme with a true 4000dpi 3G Laser™ sensor, which enables movement speeds of 5 times that of a standard 800dpi optical sensor. View the Razer 3G Laser white paper
	32KB Razer Synapse™ onboard memory With a 32KB onboard memory, you can store up to five unique gaming profiles.
	Nine independently programmable Hyperesponse™ buttons The Razer Lachesis™ allows programming of button functions while Razer’s Hyperesponse™ technology reduces latency for optimum gameplay.

Razer DeathAdder Specifications: 

 - 4000dpi Razer Precision 3G Laser™ sensor
 - 32KB Razer Synapse™ onboard memory
 - Nine independently programmable Hyperesponse™ buttons
 - 1000Hz Ultrapolling / 1ms response time
 - On-The-Fly Sensitivity™ adjustment
 - Variable true dpi setting adjustments in increments of 125dpi
 - Always-On™ mode
 - Ultra-large non-slip buttons
 - 16-bit ultra-wide data path
 - 60-100 inches per second*
 - Ambidextrous design
 - Scroll wheel with 24 individual click positions
 - Zero-acoustic Ultraslick™ Teflon feet 
 - Gold-plated USB connector
 - Seven-foot, lightweight, non-tangle cord
 - Approximate size: 129mm (length) x 71mm (width) x 40mm (height)

• Windows® 2000 / XP / X64 / MCE 2005 / Vista / Vista64
  Available USB port
  CD-ROM Drive (for drivers)
  At least 35MB of hard disk space (for drivers)

More information can be found HERE