Independent studies show that it's among the best but not quite on par with medical grade devices. I suggest to have a look at this channel https://www.youtube

Independent studies show that it's among the best but not quite on par with medical grade devices. I suggest to have a look at this channel https://www.youtube.com/watch?v=7m_oBiYk8Rk https://www.youtube.com/watch?v=7m_oBiYk8Rk