Logitech M240 SILENT Off-White Bluetooth Mouse Reliable Bluetooth® mouse with comfortable shape and silent clicking Dimensions Mouse Height_ 99 mm Width_ 60 mm Depth_ 39 mm Weight (with batteries): 73.8 g Technical Specifications SilentTouch Technology 90% noise reduced Left/Right-click, Middle click 1Left click dBA level measured by independent lab at 1m. Compared with Logitech M185. Sensor Technology Smooth optical tracking Nominal value_ DPI range DPI range_ 400-4000, Steps of 100 DPI Buttons Number of Buttons_ 3 (Left/Right-click, Middle click) Scrolling Line-by-line scrolling Scroll Wheel_ Yes, 2D, optical Battery life Battery life_ 18 months 2Battery life may vary based on user and computing conditions. Battery Details_ 1 x AA (included) Connectivity Connection Type_ Bluetooth Low Energy Technology Wireless range_ 10 meters 3Wireless range may vary based on user, environmental and computing conditions. Connect / Power_ Yes, on/off switch Optional software Supported by Logi Options+ on macOS 11 or later and Window 10, 11 or later Sustainability Off white plastics_ 37% post-consumer recycled material 4Excludes printed wiring assembly (PWA) plastics, and packaging. Graphite plastics_ 48% post-consumer recycled material 5Excludes printed wiring assembly (PWA) plastics, and packaging. Rose plastics_ 37% post-consumer recycled material 6Excludes printed wiring assembly (PWA) plastics, and packaging. Certified carbon neutral Warranty Information 1-Year Limited Hardware Warranty