The Camplux outdoor portable tankless water heater 2.11 GPM is perfect for campsites, cabins, or simply around the house, washing your car, washing your boat, taking a hot shower, washing the dogs or the horse. The electronic ignition is powered by 2 D batteries which makes it great for off-grid or other areas where electricity is not readily available. This camping water heater focuses on innovative combustion technology and advanced multiple protection systems to ensure your safety.