Like TENS units, Quell uses electrical nerve stimulation in order to provide pain relief, but TENS devices range from very low dose devices available over-the-count to higher powered technology used in a healthcare setting. Quell is up to 10x more powerful than popular OTC (over-the-counter) TENS devices. Quell is powerful enough to stimulate the sensory nerves in the upper calf to block chronic pain. Quell is also the only OTC electrical nerve stimulation device that is FDA cleared for use while sleeping and is wearable 24/7. Learn more on our blog at http://blog.quellrelief.com/closer-look-tens-devices.
*Comparison to leading OTC TENS devices, based on IRI data. Max sustained energy when used as directed