Meet M240 Silent, the reliable Bluetooth® mouse that frees up your workspace. Key Features Pair and PlayWith fast, easy Bluetooth wireless technology, you’re connected in seconds to this quiet cordless mouse —no dongle or port required Less NoiseSilent mouse with 90% reduced click sound and the same click feel, eliminating noise and distractions for you and others around you (1) Long-Lasting Battery LifeUp to 18-month battery life with an energy-efficient auto sleep feature, so you can go longer between battery changes (2) Comfortable, Travel-Friendly DesignSmall enough to toss in a bag; this slim and ambidextrous portable compact mouse guides either your right or left hand into a natural position Long- RangeReliable, long- range Bluetooth wireless mouse works up to 10m/33 feet away from your computer (3)   (1) Left click dBA level measured by independent lab at 1m. Compared with Logitech M185. (2) Battery life may vary based on user and computing conditions (3) Actual wireless range may vary based on use, settings, and environmental conditions