The cheapest robovacs will only have a dock for charging. Pricier models incorporate self-emptying of the onboard dustbin, and draining/refilling of the onboard water tanks. The very fanciest models offer automatic mop pad cleaning, and detergent dispensing for the mopping fluid. A new robot vacuum can be a significant investment, https://bookmarkmargin.com/story19482489/the-ultimate-guide-to-top-3-automatic-vacuum-cleaners