Liroyal Lovely Animals Wireless Optical Mouse with DPI Switch Pink Pig Small enough to plug in once and leave connected. Wireless : Plug in receiver and go wireless. 2.4GHz reliability and performance. Compatible with USB 2.0 or 1.1,Working range within 10 meters (30 Feet) 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