Logitech Logicool Wireless Mouse, Wireless (2.4GHz), Silent, 3-Button, Compact Design, M221 No longer needed due to tidying up my desk. It's still usable, so please make use of it. Includes one new battery. Please check the condition carefully in the photos before purchasing. Product Description Connection Method: USB Wireless (2.4GHz) Wired/Wireless: Wireless Reading Method: Optical Silent Design: Yes Resolution: 1000 Scroll Wheel: Yes Number of Buttons: 3 Back/Forward Buttons: No Handedness: For both hands Power: AA battery Color: Gray Width: 60mm Height: 39mm Depth: 99mm Weight: 75.2g Other ● Mouse body size (width x depth x height): 60 x 99 x 39mm ● Receiver weight: 1.8g ● Sensor method: Optical ● Resolution: 1000dpi ● Total number of buttons: 3 ● Scroll wheel: Yes ● Tilt function: No ● Batteries used: 1 AA battery (already installed in the main unit) ● Battery life: Up to 18 months (varies depending on usage and environment) ● Operating distance: Approximately 10m (varies depending on usage and environment) ● Wireless method: Advanced 2.4GHz wireless technology ● Supported OS: Windows (R) 10 or later, Windows (R) 8, Windows (R) RT, Windows (R) 7, Mac OS X 10.5 or later, Chrome OS (TM), Linux Kernel 2.6+ ● Connection I/F: USB