Office Optical 1600 DPI Black Right-hand RF Wireless 8 m Scroll type: Wheel Buttons quantity: 4 Power source: Batteries 2 AA Compact wireless mouse with silent buttons; made with 83% recycled materials Mouse Frequency band 2.4 GHz Number of movement resolution modes 2 Customizable movement resolution Yes Button functions DPI switch Buttons type Pressed buttons Buttons quantity 4 Scrolling directions Vertical Number of scroll wheels 1 Scroll type Wheel Movement resolution 1600 DPI Movement detection technology Optical Device interface RF Wireless Purpose Office Design Surface coloration Monochromatic Product colour Black Ergonomic design No Form factor Right-hand Ergonomics Wireless range 8 m Power Service life of battery 6 month(s) Battery type AA Number of batteries supported 2 Rechargeable No Power source Batteries System requirements Other operating systems supported ChromeOS Mac operating systems supported Yes Windows operating systems supported Yes Weight & dimensions Weight 84 g