Lenovo Go RF Wireless Office Optical Mouse in Grey 2,400 DPI Product colour___Blue. Silver she's not just the smaller she's not just the smaller sibling she's a force to be reckoned with 10 year Sandisk warranty 4 GHz Number of scroll wheels 1 Number of programmable buttons 3 Programmable mouse buttons Yes Customizable movement resolution Yes Movement resolution 2400 DPI Buttons type Pressed buttons Buttons quantity 6 Scroll type Wheel Movement detection technology Optical Device interface RF Wireless Purpose Office Design Surface coloration Monochromatic Product colour Grey Vertical design Yes Ergonomic design Yes Form factor Right hand Power Battery type AA Number of batteries supported 1 Power source Batteries Operational conditions Operating relative humidity (H H) 20 95% Operating temperature (T T) 0 40 °C System requirements Windows operating systems supported Windows 10 Mouse Certification CB