+ U can updte firmware change lighting .... enable or disable acceleration. It could be an improved version of the abyssus.

1800dpi Razer Precision infrared sensor
1000Hz Ultrapolling / 1ms response time
On-The-Fly Sensitivity adjustment
No Drift Control
Always-On mode
Ultra-large non-slip buttons
16-bit ultra-wide data path
60-120 inches per second and 15g of acceleration
Three independently programmable Hyperesponse buttons
Ambidextrous design
Scroll wheel with 24 individual click positions
Zero-acoustic Ultraslick Teflon feet
Seven-foot, lightweight, non-tangle cord
Edited by vss vintorez - 8/5/12 at 9:31pm