optical sensor that is stable for accurate tracking. For long-lasting comfort, use ergonomic design. LED lighting that is integrated. HP's standard warranty is limited to one year from the date of purchase. Type of connection: USB 1000 DPI is the wired DPI. There are three buttons. Operating systems supported include Windows XP, Windows 7, Windows 8, and Windows 10. Voltage/current rating: DC 5V/<80mA Dimensions of the unpackaged product: 11.8 cm (L) x 6.4 cm (W) x 3.7 cm (H) Weight of the unpackaged item (including cable and weighting block):.2 lbs