Electric rechargeable heated socks for chronically cold feet ( Heated Area: Front instep) 3 Levels Temperature Setting: High (Red), medium (Orange) and Low (Green) Electric Foot Warmers: Absorbent, breathable, elastic thickened, super soft & cozy, padded reinforced heel & toe,and recessed heating element help focus heat in the toe to keep your feet from getting cold Great for hunting, skiing,ice fishing, hiking, and sporting events. Won't shock, even when wet! Includes (1) pair of socks, (2) 3.7V li-ion rechargeable batteries, (1) ac charger