BLACK+DECKER BDH1725SM SmartSelect Steam Mop Kills 99;9% of germs using just water - no chemicals required; great for homes with kids or pets With smart select technology, select the specific floor type and the mop automatically releases the right amount of steam The tank holds enough water for over twenty-two minutes of uninterrupted cleaning Ready-To-Go tank illumination changes from red to blue when the water reaches the correct temperature Mop automatically shuts off the steam when parked upright for those quick pauses during cleaning