BH30-RRG: The BH30-RRG is a 30 gallon insulated drum heater with two power ranges, high power for rapid heating when things are cold then it automatically switches to low power to maintain the temperature. It operates on 120 volts AC, first at 560 watts then switches down to 280 watts, and it can heat up to a fixed temperature of 100 °F / 38 °C (±10 °F / 5 °C). The heated blanket is constructed with a heavy-duty vinyl suitable for extreme weather conditions (down to -40 ºF / ºC). Like all Powerblanket products, the Xtreme versions deliver safe heat to temperature sensitive materials, preserve expensive materials without overheating or burning; its insulated, full-wrap design makes it more energy-efficient, is water-resistant, and is ETL certified to UL & CSA safety standards.