Logitech Wireless Trackball M570
NOTE:The connector/wireless receiver is found inside the back side of the mouse. Wireless operating distance: Approx 10m4. Sensor Resolution: 540
Trackball comfort: Sculpted shape supports your hand and stays in one place-move the cursor without moving your arm
Work and play anywhere: Get smooth, precise cursor control wherever you use your trackball-your desk, couch, even your bed