Auto Recharge Robot Vacuum Cleaner is your good choice.Wireless carrier indoor positioning technology. Through the combination of the body itself and the built-in wireless carrier probe in the charging base, it double-measures the distance change to locate the machine coordinates. It has strong anti-interference ability and high accuracy. The indoor positioning error can be controlled within 1cm. Representative brand model: Proscenic 790T.VSLAM image displacement positioning technology. The ceiling is photographed by the built-in camera, and three objects are found on the ceiling to realize real-time positioning in the indoor environment, and then the composition and path planning are carried out. It should be noted that the ceilings of general households are often relatively simple, and there are not enough points that can be used as reference points, which will directly affect the positioning of the machine. Representative brand model: iRobot 980.