logitech cordless trackman optical - trackball - optical - wireless - rf - usb wireless receiver
this innovative trackball combines advanced cordless and optical technologies with useful new buttons advanced scrolling buttons scroll wheel drag lock button forward and back buttons . this cordless finger-operated trackball eliminates the cord clutter and provides precise accurate optical performance . logitech s advanced digital radio technology combined with marble optical performance is reliable and responsive . logitech s smart power management allows the trackball to work beyond six months on the included aa batteries . the low battery indicator gives plenty of warning before the batteries need to be changed . the ultimate trackball . only from logitech .