Logitech M570 Wireless Trackball Product Description Your coffee table. Your favorite chair. Your comfy bed. Now there's no limit to where you can get precise cursor control. This hand-friendly wireless trackball lets you work and play wherever you want. No mouse to move around. No tricky keypad leaving your hand feeling cramped. Just roll the ball with your thumb and click. Precision never felt so comfortable. Thumb-operated trackball and laser sensor for smooth, precise cursor control. Works anywhere you do-even your sofa. Powerful 30 ft. wireless range with tiny leave-in Logitech Unifying receiver. It has up to 18 months of power on a single AA battery. Scroll wheel and Back/Forward buttons for easy document and web page navigation. Enhanced comfort-refines the time-tested shape of the popular Logitech Trackman Wheel. 				    	 					 From the Manufacturer           Trackball comfortYour trackball stays in one place, so you don’t have to move your arm to move your cursor. Its sculpted shape supports your hand to let you work all day in comfort.     Compact footprintShort on space? No problem. Because the trackball doesn’t move, it’s perfect for tight workspaces and busy desks.      Time-tested shapeMillions of people have loved the Logitech Trackman Wheel. We’ve refined its proven shape to create the M570.    Logitech Advanced 2.4 GHz wirelessYou get the reliability of a cord with cordless convenience and freedom—fast data transmission and virtually no delays or dropouts.      Wireless freedomWho wants a cord in the way? The robust wireless connection lets you control your laptop, desktop computer or home theater PC from up to 30 feet (10 meters) away.     Tiny, wireless receiverIt’s so small it can stay plugged in a USB port. You don’t have to unplug it when you move around or worry about losing it. And your trackball is always ready to use.     Logitech Unifying technologyEasily connect up to six compatible wireless devices—keyboards, number pads or mice—without the hassle of multiple receivers filling up your USB ports.    Storable receiverIf you do need to remove the tiny receiver, just tuck it away right next to the battery.     18-month battery lifeThe long battery life virtually eliminates the hassle of changing batteries. The On/Off button saves power, while an indicator light helps you avoid surprises.    Work—and play—anywhereYou get precise cursor control wherever you want to use your trackball. Hard tables, comfy sofas and lumpy beds are all no problem for the M570.     Adjustable speedThe M570 now sports an adjustable laser sensor, giving you a wider range of cursor speeds—and the perfect amount of control.    Scroll wheelYou can easily move up and down through Web pages and long documents.     Programmable buttonsYou can customize your trackball’s buttons to help you do what you want faster.     Back/Forward buttonsMoving quickly between documents or browsing your favorite Web sites is a breeze with large, easy-to-reach Back/Forward buttons.     Easy to cleanShould you need to clean your trackball, removing the ball is a snap.    Easy to moveYour desk, your comfy chair, your bed—this trackball is easy to take with you around the home. The ball even stays in place when you turn it upside down.