Features High-precision optical sensor design Programmable button make it easier for surfing the web or reading documents 3D scrolling in all Windows 98 / 2000 / ME / XP / Vista Optical Technology: 800dpi high resolution Scroll Wheel: Yes Interface: PS/2 Cable Length: 1.8 m / 5.4 ft Color: Silver / black Package Options: OEM Bulk, Retail Availability: Usually ships the same business day MO-5013PRegular price: $7.50Sale price: $3.50, 10/$30.00Package-Option: OEMRetail(+0.25) Secure On-Line Ordering Site Tel: (888) 860-4416 Fax: (732) 416-8788 sales@pctekonline.com Business hours are from 10:30am to 7:00pm EST Monday to Friday 3 Kellogg Court Suite 11 Edison NJ 08817 Copyright (C) 1997-2011, PCTekOnline.com All rights reserved. Thank you for shopping at PCTekOnline.com !