Monitor the ground condition below, brake and turn in time when the drop of steps and window sill is detected, so as to avoid problems such as bumps and motor damage caused by the fall of the fuselage, and protect the safety of the equipment. Effectively avoid the problems such as loose internal parts and damaged shell caused by drops, reduce the frequency of maintenance, reduce the long-term use cost, and help the equipment to run stably for a long time. Without fear of the edge of the room, around the stairs and other areas, it can be cleaned close to the edge without falling, expanding the cleaning area, reducing manual sweeping, and maintaining the cleaning integrity of the whole house. Easy installation, daily cleaning only needs to wipe the surface, simple operation, no complicated maintenance, saving time and effort. Anti-collision Cliff Sensor，Compatible For Dreame，RLS3，Robot Vacuum Cleaner Spare Parts