M221 reduces over 90% 4Sound level comparison between Logitech M221 and Logitech M170. Left click dBA measured by an independent lab at 1m of noise, creating a quieter and more productive environment for you and those around you. The small size and smooth cursor control make it great for tight workspaces and busy desks
90% noise reduced Left/Right-click, Middle click 1Sound level comparison between Logitech M221 and Logitech M170. Left click dBA measured by an independent lab at 1m
Smooth optical tracking DPI (Min/Max): 1000
Number of Buttons: 3 (Left/Right-click, Middle click) Line-by-line scrolling
