Wireless Mouse Logitech M240 Silent, 400-4000 dpi, 3 buttons, Ambidextrous,1xAA, Bluetooth, Rose . PN 910-007121 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 Part Number Graphite  910-007119 Off-White  910-007120 Rose  910-007121