don t buy floss brand products [SEP] this is the third flosser i have purchased from this company and all have failed the first and second ones were countertop units and both broke within a few months after multiple attempts the seller refused to reply to warranty requests and i was stupid enough to buy again then i chose to try this portable one which is now leaking after a few weeks don t buy brand obviously they have problems and conpany seller does not stand behind their products