Waterpik Sonic-Fusion (SF-01) Flossing Toothbrush FOR PARTS OR REPAIR. The toothbrush unit itself is in great shape cosmetically! Seems like it needs a new internal battery. This unit is also noticeablly louder than my upgraded other similar unit that has two speeds. After a full charge, works as intended for a few minutes then the battery goes dead & it needs to be charged again. Guessing the battery has some dead cells. When the unit goes from 3 bars battery to 2, that's when it goes completely dead. Does not come with used brush head. Also when I first acquired this item about a year ago, I tested the flossing function & it worked normally. Haven't tried it again since. Ships ASAP via USPS Ground Advantage. No returns so please ask any questions beforehand.