Features: Optical mouse can work on almost any surfaces,it also can eliminate dust. Ergonomic design makes more comfortable. Espacially for laptop users. Specifications: Interface:PS/2;USB;USB+PS/2 Software resolution: up to 6400 DPI Hardware resolution: 800DPI Mouse Buttons:2 Buttons+ 1 Wheel Micro Switch:3 million cycle life Encoder: Opto-Mechanical Browse way: Vertical + Horizontal Scroll Driver compatible with: Windows 98/2000/ME/NT/XP Technology standard: CE&FCC, meet with RoHS and WEEE Cable：80cm Color :Various painting color available Color box or blister packing FOB Shenzhen