What it is: A primer intended to be used with the Theraface PRO device (sold separately) prior to starting the microcurrent treatment.What it does: The gel primer acts as a microcurrent activator to prime skin for the treatment, and it allows the TheraFace PRO to glide easily and comfortably over your skin.The lightweight gel helps restore skin's moisture levels while ensuring the best microcurrent results. How to use: Apply to clean, dry face before using the Microcurrent Ring (sold separately).