5000PA strong fan + special cleaning cloth, no suction loss, efficient and cleaner Built-in intelligent sensor, high-altitude cleaning glass does not fall. 50 minutes backup battery, power failure protection. Safe to wipe without fear of falling off. External load-bearing suction cup + safety elastic rope, one suction and one pull, safe and reliable. Intelligent planning, line-by-line window cleaning, high coverage, less missed cleaning., Manufacturer: TRDEWR