The Logitech Wireless Mouse M705 helps you power on and on. It uses significantly less power than comparable wireless mice, offering up to three years of battery life. The tiny wireless receiver stays plugged into your computer, ensuring your mouse is always ready to go. Enjoy smooth, responsive cursor control with laser tracking, and navigate long documents with hyper-fast scrolling. Its sculpted, right-hand shape provides comfort for extended use. The package includes the Logitech Unifying receiver, 2 AA batteries, and user documentation. It comes with a 3-year manufacturer's guarantee and full product support. System Requirements: Windows XP, Windows Vista, Windows 7, Windows 8, or Mac operating systems.