I had an old unit and bought this. Works great and love the feature that it works off my phone. One less thing in my pocket!!
Best device ever
I wear my tens unit daily. I order 40 pads, and received 4. I emailed customer service and within a couple hours I was emailed back that the rest of my order was on its way with an apology. When the rest of my order arrived there was a hand written note apologizing again, and 4 extra pads. Nice touch.
The pads really stick well and last many uses!! Highly recommend this product!