They are precisely the same. They are packaged the same. They work exactly the same using the same frequency and pulse rate. The loop diameter can be different no more no less between 10 cm and 12 cm.
The only difference is the body application. One for foot, one for knee, one for back and one for muscle and joint. The loop for the knee that you can buy over the counter right now should contain the exact label and package as the one for back and muscle and joint.
This is what is so puzzling about this additional requirement imposed by the FDA on the company to approve the product for back pain and for muscle and joint. It's a bit silly, but caused a huge over burden and aggravation to BIEL. The good thing is that the back pain clinical trial is done and produced great results and should expect no less than GREAT NEWS.
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