1)1800dpi Razer Precision 3G infrared sensor 
  2) Seven independently programmable Hyperesponse buttons 
  3) On-The-Fly Sensitivity adjustment 
  4) Always-On mode- Ultra-large non-slip buttons 
  5) 16-bit ultra-wide data path 
  6) 6400 frames per second (5.8 megapixels per second) 
  7) Up to 60 inches per second and 15g of acceleration 
  8) Scroll wheel with 24 individual click positions 
  9 ) Zero-acoustic Ultraslick™ Teflon feet 
  10) Gold-plated USB connector 
  11) Seven-foot, lightweight, non-tangle cord 
  12 )Approximate size: 128mm (length) x 70mm (width) x 42.5mm (height)