Main Specifications Product Description Logitech Cordless TrackMan Optical - trackball Device Type Trackball Connectivity Technology Wireless ( RF ) - PS/2, USB - NOTE: THIS PRODUCT CANNOT BE SHIPPED TO MASSACHUSETTS OR DISTRICT OF COLUMBIA (WASHINGTON, D.C.) Movement Detection Technology Optical Features Drag lock, scrolling wheel Battery 2 x AA type - WARNING: The solder used in this product contains lead, a chemical known to the State of California to cause birth defects and other reproductive harm. Please wash hands after handling internal components and circuit boards and avoid inhalation of fumes if heating the solder. OS Required Microsoft Windows 95/98, Apple MacOS 8.6 or later, Microsoft Windows 2000 / NT4.0, Micro Manufacturer Warranty 5 years warranty Large finger-controlled trackball True cordless freedom for desktop flexibility Reliable digital radio technology that requires no line of sight Forward and back buttons for faster Inter navigation Scroll wheel and drag-lock button for easier maneuverability Patented optical technology delivering smooth tracking and superior precision Virtually maintenance-free 72" pointing devices wireless operating distanceInter Service Provider (ISP) account required for full WebWheel software functionalityCompatible with Windows 98 7 XP Vista Mac OS 10.4 or later3-year limited warrantyIncludes wireless receiver USB to PS/2 adapter and 2 AA batteries