... 800DPIKey life over 5,000,000 timesInterface:USB,U+PCompatible with Windows95/98/2000/SE/NT/XP/VistaRating:5V~20mA30% ... ,free from interference Operatingrange:1.5m(min)All-directional operation with in the distance of 1.5mColor:silver,Black,Red,CustomizePacking:Gift ... Tin Box,White Box,CustomizeAutomatic sleep mode for saving powerZoom-in and Zoom-out functionsScroll up and down directly without moving ...