https://www.cnet.com/news/the-deebot-901-smart-vacuum-scans-and-maps-your-home-for-280/ > Here's the problem with most robot vacuum cleaners, including most models from Roomba challenger Ecovacs: They roam wherever they want. You can't tell them to avoid this room or that area. > Ecovacs finally addressed that with the Deebot 901, which arrived in April with a fairly steep $400 price tag. But today only, Amazon Prime subscribers can get the Deebot 901 robot vacuum for just $279.98.