specification:

• System requirements：Windows95/98/2000/ME/XP/VISTA
  
• Load capacity: 65+/-15 (left side key and right side key) 75±15g (middle key)
  
• Keystrokes life:3,000,000 times keys life
  
• Operating temperature: 0℃~55℃;
  
• Authentication proxy: CE, FCC
  

Features:

• 800dpi High-precision optical sensors, May move unimpeded in 60 many kinds of tabletop
  
• 3,000,000 vice ministers life soft switch, response specially keen
  
• The comfortable feel, the long time use cannot feel weary
  
• Advanced optics and reel coding technique
  
• Ergonomic design
  
• 3D MOUSE