Manufacturer: Logitech. The Logitech Wireless Trackball stays in one place, so you don’t have to move your arm to move your cursor and its sculpted time tested shape supports your hand to let you work all day in comfort. The robust wireless connection lets you control your laptop, desktop computer of home theater PC from up to 30 feet (10 meters) away and the 2.4GHz wireless means you get the reliability of a cord with cordless convenience and freedom, fast data transmission and virtually no delays or dropouts. The tiny receiver can stay plugged in to 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.