Logitech M570 Wireless Trackball

Specifications Mfr Part Number: 910-001799 Features: Trackball comfort Compact footprint Time-tested shape Logitech Advanced 2.4 GHz wireless Wireless freedom Tiny, wireless receiver Logitech Unifying technology Storable receiver 18-month battery life Work - and play - anywhere Adjustable speed Scroll wheel Programmable buttons Back/Forward buttons Easy to clean Easy to move System Requirements: Windows-based PC: Windows XP, Windows Vista, Windows 7 USB port Internet connection for software download Mac computer: Mac OS X 10.5 or later USB port Internet connection for software download Package Contents: Trackball Logitech Unifying receiver 1 AA battery User documentation