4KW sauna heater, 240V., single phase. Dimensions 12″x20″x24″h. Electric heater made for dry or wet high temperature sauna. 1. Stainless steel heater is approved and advanced; 2. Heater has hidden elements (less burn the oxygen in the sauna and safe to put water on the rocks); 3. Heater is self-defense. If you touch side of the heater you will not burn yourself; 4. Heater has extra deep compartments for rocks – about 150lbs or up to 90kg of rocks; 5. Heater has 5 years factory warranty; 6. Heater is free standing on the floor with adjustable legs.