HP Qy777aa

Optical Tracking - Avoid getting stuck and constant cleaning with optical tracking, a system controlled by light. This results in fewer moving parts compared to ball mice, leading to greater durability. Users benefit from a smooth, rounded shape suitable for both hands, and a mouse wheel that functions as a third mouse button.

The optical sensor in the HP USB Scroll Mouse uses a scan rate of 800 dpi, allowing for precise movements without the need for a mouse pad, ball, or rollers.