Add comfort and control to your computing experience with the Trackman Marble Mouse from Logitech . This mouse keeps you comfortable and supported all day - and stays in one place .A trackball design with a long, broad palm area and gentle curves keeps your hand comfortable and supported all day - whether you use your right or left hand. The Button controls let you easily move forward and backward when you’re surfing the Web. The Optical technology gives you smooth tracking on almost any surface so you can be productive wherever you work. This product is Customer Specific . Device Type: Trackball Connectivity Technology: Wired - USB Orientation: Right and left-handed Movement Detection Technology: Optical Buttons Qty: 2 Features: Logitech Marble optical technology Cables Included: 1 x USB cable - integrated OS Required: Apple MacOS X 10.3.9 or later, Microsoft Windows Vista / XP Microsoft Certification: Works with Windows Vista Manufacturer Warranty: 3 years warranty Device Type: Trackball Orientation: Right and left-handed Connectivity Technology: Wired Interface: USB Movement Detection Technology: Optical Buttons Qty: 2 Features: Logitech Marble optical technology Interfaces: 1 x USB - 4 pin USB Type A Cables Included: 1 x USB cable - integrated Works with Windows Vista: Software and devices that carry the Works with Windows Vista logo have been tested for baseline compatibility with PC's running. Software Included: Drivers & Utilities, Logitech MouseWare OS Required: Apple MacOS X 10.3.9 or later, Microsoft Windows Vista / XP Additional Requirements: CD-ROM, USB port Service & Support: Limited warranty - 3 years