Etekcity Wireless Optical Mouse for PC Laptop Desktop with DPI Switch Nano Receiver: Small enough to plug in once and leave connected. Wireless: Plug in the nano receiver and go wireless. 2.4GHz reliability and performance. Compatible with USB 2.0 or 1.1,Working range within 10 meters (30 Feet) Receiver Storage: Convenient nano receiver storage for when you need it. Comfort Grip: Smooth, rubberized grip designed for comfort and control. Compatible with Windows 98SE, ME, 2000, XP, Vista, Windows 7, Windows 8