Logitech M705 Marathon wireless mouse. Used tested and works with usb unifying receiver and battery cover. Has marks and minor scratches from normal use. Specifications say it boasts a three-year battery life, two thumb buttons, the scroll wheel includes a button prompt along with two independent right and left functions. Rated at a 1000 DPI sensor resolution, tilt-scrolling, and two scrolling speeds. Logitech says it’s good for a range of a little over 30 feet. 4.76 inches(long) x 1.65 inches(tall).              (B16)p1