Meet M240 Silent, the reliable Bluetooth® mouse that frees up your workspace. Pair in seconds with a fast, easy Bluetooth® connection—no dongle or port required. The ultra-quiet mouse features a 90% reduced click sound with that same click feel, eliminating noise and distractions for you and others around you. (1) A comfortable, contoured shape follows the natural curve of your hand so you can stay productive longer, and focus on what you do best. Built with the same quality standards that has made Logitech a leader in mice and keyboards. (1) Left click dBA level measured by independent lab at 1m. Compared with Logitech M185.