Silent Mouse - Reduced click sound and same click feel eliminates noise and distractions for you and others around you DURABLE & ERGONOMIC SHAPE - 5,000,000 times clicks using experience brings long life span. Symmetrical Design makes it convenient for both left and right hands, streamline shell is very comfortable to use it all day High-definition-1000 DPI tracking engine. Enjoy responsive and smooth cursor control with the 1000 DPI high-definition optical tracking engine Anti-slip and Silent Scroll-The grille anti-slip pattern on the scroll wheel ensures fast, easy and accurate scrolling. Almost little noise when you slowly scroll it. Please note: Middle button click is not quiet. All the products are hassle-free LIFETIME return and refund or replacement. Silent Mouse - Reduced click sound and same click feel eliminates noise and distractions for you and others around you.