Quickly heat water with the turn of a knob. Adjustable from no heat to 160 F. Heats from cold to 100 F in 5 seconds. Fill the 5 gallon water container (included) from any drinking water source, connect the pump and propane cylinder and you are ready to go. Heat up to 40 gallons of water on one 16.4 oz propane tank. Pump operates on a rechargeable 6-volt battery which can be recharged either at home or in a car. Cords store inside the heater. Internal microprocessor controls over temperature shut-off device and low voltage indicator. Efficiently heats water without dangerously heating the outer body of the unit. Optional accessories for even more versatility.