Number of Controllers: 1 Controller Features: Plug and Play Technology, Wireless, Scrolling Wheel, Ergonomic Design Wired Connectivity: Wireless, USB 2.0 Wireless Technology: Wireless USB Number of Buttons/Keys: 2 Maximum Operating Range: Up to 82' Mouse Speed: 1000 dpi Operating System Compatibility: Mac OS X, PC, Windows, Windows Vista, Windows XP, Windows 7 System Requirements: USB Port Model Compatibility: PC Includes: USB Receiver, On/Off Switch Power Source: Battery-Powered Material: Plastic Dimensions: 3.54 " L x 1.97 " W x 3.39 " T Weight: 3.03 oz. Warranty Description: 1 Year Limited Manufacturer Warranty Battery Required, included: 1 alkaline AA