Microcurrent is sub-sensory meaning that it cannot be felt as the current is below the sensory threshold. Microcurrent falls within the microamp range, which is one millionth of an amp. Stronger currents that stimulate the nerves do not provide the same intended benefits, and have different applications. Even the most sensitive of horses can generally tolerate microcurrent incredibly well. It’s sub-sensory nature makes it much easier to apply than many other therapies and interventions.