This product is designed to be an auxiliary source of warmth for individual use that is unencumbered by wires tied to a power source. The “Rechargeable Warming Cushion” is supplied with power by a Lithium Ion rechargeable battery that is integrated in the device’s controller. Simply charge the battery by plugging into power main. After being charged, the battery/controller piece is plugged into the cushion. The degree of warmth can be selected in 4 levels between 38 and 55 degrees Centigrade.