1) Specifications and Details Specification Mouse Height: 99 mm Width: 60 mm Depth: 39 mm Weight (with battery): 75.2 grams 2) Technical Specifications SilentTouch technology Noise Reduction 90%* Left/Right click, Center 1 volume levels are based on Logitech M221 vs Logitech M170. Left click volume level measured by independent lab at 1 meter distance. 3) Sensor Technology Smooth Optical Tracking DPI (min/max): 1000±. Keystrokes Number of Keys: 3 (Left/Right, Center) 4) Scrolling Line-by-line scrolling Scroll wheel: Yes, 2D, Optical 5) Battery Battery: 18 months 2 Battery life Battery details: 1 AA battery (included) 6) Connectivity Connection type: wireless Wireless Range: 10 meters Connection/Power: Yes, on/off 9) Compatibility USB Receiver Available USB Ports macOS 10.5 or later Chrome OS Linux® kernel 2.6+ 10) Product List Mouse USB receiver 1 AA battery (pre-installed) User documentation'