Product name: optical mouse Model No:SK-9501W Feature: Optical mouse can work on almost any surface. Specifications: Port: PS/2, USB and USB+PS/2 Software resolution: up to 6400 DPI Hardware resolution: up to 420 or 800DPI Mouse buttons:Two keys+one wheel Micro switch: I million cycle life Encoder: optical+mechanical Browse way: vertical+horizontal Compatibility: Win95/98/2000/ME/XP Size:123*64*40mm Color :Various painting color available Technology standard: CE&FCC, meet with RoHS and WEEE MOQ:2000 Delivery date:15 days