xiaomi Roborock S50 Top-mounted Laser Distance Sensor (or LDS) that scans its surroundings 360 degrees, 180 times per second to map out the area,Inside the robot are three processors that tract its movements real-time,The Simultaneous Localization and Mapping (or SLAM) algorithm helps it calculate the most efficient cleaning path making this robot fully capable of cleaning multiple rooms without getting lost.If you like xiaomi Roborock S50, you can buy it through our website.