Ok if it turns on but comparatively to the other brands Ive purchased in this price range it is not the best!This I would consider as a very poor purchaseif you want good dental hygiene there are a lot better ways to spend your money!Perfect for my 8 year old. Got tired of the kids tooth brushes that stop after a minute or play music. Some can be really annoying. This one is easy for him to hold, he knows to switch where he’s brushing after it vibrates on the 30 sec mark and he brushes for the full two minutes. His brushing habits have improved, which makes for one happy momma.It is battery free, uses electricity. Don't know about battery life; has none.Bought this for my seven year old. He has admired mine for awhile and enjoys using it. The timed feature has been helpful in keeping him on task. The only downside would be that it is plug in not usb.It's ok size and weight, battery life all great. But even on its most powerful setting I did not feel my teeth getting clean. It felt not make ch more than manual brushing.Has a nice travel bag, extra toothbrush heads and isnt so powerful that your mouth vibrates for ten minutes after brushing. Has different settings also.What my son wanted and needed.