The BH55PROG is a 55 Gal. insulated drum heater with a digital temperature controller. It operates on 120-Volt AC, at 800-Watt, 6.67 Amp and can heat up to a maximum temperature of 145°F/63°C (plus/minus5°F/3°C). The digital temperature controller allows you to adjust the temperature accurately and efficiently to the 1 you desire. The heater is enclosed in a heavy-duty vinyl cover for extreme weather conditions (down to minus 40°F/°C). 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 and CSA safety standards. Sometimes you need a little more protection, durability and freeze resistance. and sometimes, you don't need quite so much. When you need that extra durability and protection, the POWERBLANKET Xtreme line is the way to go. Xtreme is for those companies that work in the harshest of conditions, offering a durable vinyl shell that will maintain its structural integrity in temperatures as low as minus 40°F. Color: Gray.