Brand new, unopened device at a discount! How ZŌK Works - ZŌK provides relief by stimulating the tympanic membrane, which activates the trigeminal nerve and a number of cranial nerves through inner-ear pressure modulation, thereby providing instant alleviation of stress, pressure, tension and pulsating discomfort. Built In the USA - Our device is patent pending and has been engineered and originally produced in our trusted manufacturing partners' facilities here in the USA.