Logitech M570 Laser Wireless Trackball USB Mouse
You have a different kind of comfort thanks to its leave-in wireless receiver, long battery life and precise cursor control that lets you work and play wherever you want. Your trackball stays in one place, so you do not have to move your arm to move your cursor. Its sculpted shape supports your hand to let you work all day in comfort. Because the trackball does not move, it is perfect for tight workspaces and busy desks. The robust wireless connection lets you control your laptop, desktop computer of home theater PC from up to 30 feet (10 meters) away. The tiny, wireless receiver is so small it can stay plugged in a USB port. You do not have to unplug it when you move around or worry about losing it. And your trackball is always ready to use. With the Logitech Unifying technology, you can easily connect up to six compatible wireless devices - keyboards, number pads or mice - without the hassle of multiple receivers filling up your USB ports. Your desk or your comfy chair, this trackball is easy to take with you around the home. The ball even stays in place when it is turned upside down, But, should you need to clean your trackball, removing the ball is a snap.