Excellent and powerful Roborock robot vacuum. Little use. Cleans ceramic and carpets, and has a light mopping feature. Very wonderful and practical. It has a special place to empty its dustbin and returns to its station when finished. It does not fall down stairs and has a sensor feature. Spare parts for the dust bag and mop are available on Amazon for replacement. Its original price is over 2000. I will sell it for 1000 and they will thank me for it. It's comfortable and cleans by itself.