Mini Optical Mouse • Resolution: 800DPI • Retractable cable • Interface: USB, ps/2 and U+P • High-precision optical sensor • Working on most surfaces • Key-Press Life: over 10 million times • Customerized colors available System Requirement: • Windows 98/2000/XP/ME/Vista Packing: • Blister card, color box or white box Certificates: • CE,FCC,ROHS