This is the cordless device that relieves allergy sinus pain using a clinically proven method of low-current electrical stimulation. In a double-blind clinical trial, 82% of participants preferred the device to their existing forms of allergy pain treatment. Similar to TENS therapy but 1/1000 the power, microcurrents in the device stimulate your nerves to temporarily relieve sinus pain. A five-minute treatment provides relief for up to six hours; best results occur with continuous use. Not for use with pacemakers. Rechargeable lithium batter charges via included USB-C charger.