... chaarging,4, robotic working Automatic Intelligent Robotic Vacuum Cleaner1 portable vacuum cleaner, 2self chaarging,4, robotic working What it is?Robotic ... works?With a touch of button, this robotic vacuum cleaner goes under beds and other places where upright vacuums can ... to be recharged. Smart sensors at the bottom prevent the cleaner falling down steps or elevated surfaces. Side rotating brush ...