This Roomba 552 was part of Irobots PET SERIES line. It is Very clean picks up dirt better then most and let me tell you it does a phenomenal job. This Roomba was well taken care of but I still stripped it down to nothing inspected, tested, and detail cleaned every part. I then installed new brushes, new sweeper, new filter, new front wheel then I put aside several of each as xtras and put them In a package to keep you running for at least a year. I do extensive testing before I ever put them up for sale and if they are not perfect they become parts to make another Roomba perfect. This Roomba has a newer battery and it is running about 75 min per charge. I also include a docking station , and one virtual wall/lighthouse to keep it from going places it shouldn’t. It has a scheduler on this model so you can set what time you want it to start cleaning for you then it will dock itself to recharge. I take great pride in building Roombas and what I offer when I sell them to people. I got screwed over once on offer up buying one for my wife and that Roomba set me on this course and I want to make sure no one else gets screwed when they spend their hard earned money. Don’t settle for the cheapest Roomba Of the close to 100 ive bought I’ve only ever seen one work as it should. This Roomba will last a long time and while I don’t offer warranties I’ll tell you that I’m a guy who will answer questions help out and make it right if it doesn’t. Household, home and garden, general,