Waste of time and money, does not performs the job as it should
I ordered the product after reading a few reviews how great it is but after using that for a while I feel like it's not up to the mark. I find 2 major flaws with the product, it does not performs the job it describes. The vibrations it makes are not strong enough to break the plaque. I have very mild plaque behind the lower two teeth but I was not able to remove it.  The mirror came along is impractical for self use and the battery starts slowing down after around 8 to 10 minutes of use. So, I would not recommend this to someone does not looks to perform as advertised.
Rating: 1 stars