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Super cheap plastic construction. Fit and finish is poor. Don't drio it not even once it will likely be destroyed. Only one set of electrode pads are included. fhey tell you to buy new ones from a vendor. Doesn't help. The adhesive reminded me of those super stretchy hands. You could clean them with running water and once dry they returned to being adhesive. These pads are the same so at least you can extend theor use a bit. As for the use. If the pad isn't fully adhered you get a bee sting zap from the electricity. Once fully adhered it does a good job. My perfered setting is stroke setting 9 on my trapezius muscles. The muscles litterally jump ljke someone is manipulating them forcefully. Helps to relieve they days tensions.
It works but is very finicky and cheaply made.