I love this thing. I use it every day and you can up the power for stem to the point I can't handle it anymore. I went up to level 14 and couldn't go higher. I can lower it down to one. There are multiple modes. I like the sractch mode. After a stressful day this definately does the trick. It has audio to tell you what mode you are in. This is a high quality product and durable and can easily be recharged over and over again. I like this much better than my old one because it doesn't have any wires. I loved this product so much I ended up buying another for my parents. A great gift plus a handbag for easy storage. I give this a 5 star.
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