Model Number: MOS-M570 Brand Name: Logitech Key Specifications/Special Features: Mfr part number: 910-001799Features:Trackball comfortCompact footprintTime-tested shapeLogitech advanced 2.4GHz wirelessWireless freedomTiny, wireless receiverLogitech unifying technologyStorable receiver18-month battery lifespanWork and play anywhereAdjustable speedScroll wheelProgrammable buttonsBack/forward buttonsEasy to cleanEasy to moveSystem requirements:Windows-based PC:MS Windows XP/Vista/7USB port Internet connection for software downloadMac computer:Mac OS X 10.5 or laterUSB port Internet connection for software downloadPackage contents:TrackballLogitech unifying receiver1 AA batteryUser documentation3-year limited warrantyPlease note that we are not the original manufacturer or a licensed distributor of this product.