Heavy-duty propane powered heater comes standard with a 10' LP hose and regulator meant for connection to a propane tank. Unit offers the option of powering the blower fan exclusively by power cord extension (not included) or a fully charged DeWALT® 20 V Max® or 20 V Flexvolt® batteries for mobile functionality. Recommended power supply for the blower fan is a normal residential current of 120 volts, AC only. Factory installed high limit switches and a thermoelectric safety valve provides real time safety monitoring such as a flashing light that designates low battery or fan error. Heater unit operates on propane gas only and is not an electrical heater. DeWalt Battery B2224228 capable of 10 hour run time and charger B1106857 sold separately. Blower fan can be powered using extension cord. (Sold separately)