The All-New TidalPower Cleaning System with patented technology: sprays the hard floor with clean water to soften stains, scrubs the hard floor with a microfiber roller, removes dirty water with superior suction power and wipes off residues with a rubber scraper, leaving the hard floors spotless. One 0.85L water tank to spray clean water and one 0.9L water tank to collect dirty water. This greatly improves the cleaning efficiency and properly collects the dirty water for easy disposal.