Both the ASYRA and the ZYTO have the capability to do three things simultaneously:
They output tiny electrical currents between what’s known as the EAV (Electro-Acupuncture-Voll) points on your fingers, they measure the amount of electrical resistance or impedance between these points on the fingers and establish a baseline, and finally, the hardware outputs various frequencies and measures changes in the above mentioned electrical resistance in response to those frequencies.
For more information on the Asyra Zyto machines from Jack Miller CTN, a Traditional Naturopath, visit https://www.nhsofarizona.com/asyra-zyto