Logitech M570 Wireless Trackball Mouse – Ergonomic Design with Sculpted Right-hand Shape, Compatible with Apple Mac and Microsoft Windows Computers, USB Unifying Receiver, Dark Gray

TRACKBALL COMFORT Sculpted shape supports your hand and stays in one place—move the cursor without moving your arm CONVENIENT CONTROLS Easy to reach Back/Forward buttons makes moving quickly between documents or browsing your favorite Web sites a breeze LONG BATTERY LIFE With up to 18 months of use from a single AA battery, you might just forget your trackball uses batteries at all EASY TO CLEAN Should you need to clean your trackball, removing the ball is a snap PLUG'N'PLAY CONNECTION Nano sized Logitech wireless unifying receiver stays in your computer— plug it in, forget it, even add compatible wireless devices without multiple USB receivers.Wireless operating distance: Approx 10m