BestDealUSA Kinobo Wireless Slimline USB Mouse For Laptops/Desktop PC XP/Vista/Windows 7 (green detail)

use 1 x AA battery (not include) Features: Compatible with USB 2.0 or 1.1 Compatible with Windows 98SE, ME, 2000, XP, Vista, Windows 7 Adjustable optical sensor from 800-1200 DPI Automatically power saving, make battery working longer 2.4G Hz Free moving in 10 meters ON/OFF switch: turn on or turn off mouse power Weight: 2.80 oz Package Contents: 1 x Wireless Mouse 1 x Nano receiver