Sorry, I forgot about the depth of penetration argument, notice how there was no talk of facts or evidence describing how depth of penetration means faster medical efficacy because it doesn't. In an effort to make the product heal faster, they just noticed when the power was turned up(increasing frequency) a byproduct was depth of penetration. Make the pulse stronger and it goes deeper into tissue. The stronger pulse is what makes healing faster, it also starts to generate heat which can become painful if you wear the product too long. That's why you can't just put it on like the actipatch and forget about it.
12.7cm (5") vs 7.7cm (3.03"). Neither will penetrate from one side, into the center of the average adult human. The reason, it is not necessary. New BIEL research is finding that it is actually possilbe to relieve pain without placing the loop over the area causing pain. "for example, the painful feeling of a shin splint, in someone who's leg has been amputed from the knee down." placing the loop over the nerves that send signals to that area causes the same pain relieving effects. Hence, in 20 years, they've never had a reason to say, our 3" isn't getting deep enough, we better try to get more penetration.
Unlike some aspects of a man's livlihood, another 2" of pentration depth won't make a meaningful difference here. Endonovo is proving the case that bigger isn't always better..