Used robot vacuum only a few times and it's clean. 【Fully Automatic Hands-Free Cleaning Technology】 The base station allows for automatic mop washing, automatic dust emptying, hot air drying, automatic water tank refilling, and self-cleaning of the station. The newly upgraded drying feature can dry the dirty water tank simultaneously with drying the mop. The Roborock S7 Max Ultra robot vacuum provides fully automatic cleaning to save time and completely free your hands. 【Upgraded Cleaning Power】 The vacuum features 5500Pa suction power and a sonic mopping system that vibrates 3000 times per minute with constant pressure, efficiently breaking down stubborn stains. The mop also automatically lifts 5mm to prevent dirt from transferring to clean areas (secondary pollution). 【Reactive Obstacle Avoidance Technology】 The vacuum can measure the distance to objects using smart sensors to avoid potential hazards. The precise LDS navigation system plans efficient cleaning routes to help it navigate your home with the highest possible accuracy, even in complete darkness. 【Automatic Emptying and Refilling】 The docking station uses the latest automatic emptying technology with a 2.5L dust bag, allowing replacement once every 7 weeks at most. It is also equipped with a 3L clean water tank and a 2.5L dirty water tank, and automatically refills the vacuum's water tank before starting cleaning. 【Smart App】 The app automatically detects places where the robot might get stuck and suggests marking them as "no-go zones." You can also draw virtual walls via the Roborock app to prevent cleaning specific areas. Using the 3D Mapping feature, you can accurately simulate your home and add furniture details for a comprehensive map that ensures the best possible cleaning performance.