Logitech M570 910-001799X Black 5 Buttons 1 x Wheel USB RF Wireless Laser Trackball Hand Orientation: Right Hand Power Supply: 1 x AA Battery Operating Time: 18-month battery life Distance: Up to 30 feet Operating System Supported: Windows XP, Windows Vista or Windows 7 Mac OS X 10.5 or later System Requirement: USB port, Internet connection for software download
