Stable optical sensor for precise tracking. Ergonomic design for lasting comfort. Built-in LED lighting. HP standard one-year limited warranty from date of purchase. Connection type: USB Wired DPI: 1000 DPI Number of buttons: 3 Supported operating systems: Windows XP/ 7 / 8 / Windows 10 Rating voltage/current: DC 5V/<80mA Unpackaged product dimensions: 11.8cm (L) x 6.4cm (W) x 3.7cm (H) Unpackaged product weight: .2 lbs (includes cable and weighting block)