Logitech Wireless Mouse M171 - Black

Smooth optical tracking Number of buttons: 3 (Left/Right-click, Middle click) Line-by-line scrolling Scroll Wheel: Yes, 2D, optical Battery Details: 1 x AA (included) Connection Type: 2.4 GHz wireless connection Wireless range: 10 m 6Wireless range may vary based on user, environmental and computing conditions.