Logitech - M570 Wireless Trackball Mouse - Gray/Blue
Trackball mouse with reliable optical tracking
Trackball mice require less wrist movement than traditional mice, since they track the motion of the built-in ball instead of the movement of the entire mouse.
Wirelessly connects to the included Logitech Unifying receiver, which plugs in to your computer’s USB port.
Features a scroll wheel and back and forward buttons, so you can easily control computer functions.
Sculpted shape supports your hand
Allowing you to remain comfortable for long stretches of time.
Compatible with most Windows and Mac computers
Works across a wide array of computers.