BISSELL Smartclean Black Auto Charging Robotic Vacuum Polyvinyl Mat 600 RPM Switch Type Trigger Drill Driver Kit 600 RPM Switch Type Trigger with Lock On Color Family Blue Assembled Dimensions 11 A: Clean Room Class 100 8 volt Li ion battery provides 80 min of runtime on a full charge (charger included) Drop sensors signal the vacuum to maneuver away from stairs for worry free cleaning all around your home Invisible wall technology keeps the unit in the rooms you want to clean and out of the ones you don’t Auto charging means the vacuum returns to the docking station when cleaning is done or the battery is low 13 in W cleaning path picks up more dirt in one pass 8 Battery Type Lithium ion (Li ion) Battery Charger Included Yes Rechargeable Storage Base Yes Battery Recharge Time (Hours) 4 Automatic Shut Off Yes Auto Charging Yes Pattern Movement Random Height (Inches) 3