Review title is buzz saw or toothbrush [SEP] The first one only worked a few times before the button wouldn't turn it on.  But amazon did a very swift return and this one is still working after a few weeks.  This thing is really noisy! And the every 30 second notification of time is annoying.  I don't need to know when 30 seconds has past.  I like the 2 minute warning but every 30 seconds is too much. What it does is give you two little bursts of reduced speed. They should spend the money they spent on making it light up GREEN when fully charged to give you the option of shutting off or changing that. And really why do we need a green light? I brush then put back in the charger each time so its not like I need to know it is charged. I probably will try a different brand next time or look for one with less "features". It brushes well and has two brush speeds.