Specifications: 1) Power: 4-10.5kW 2) Two controllers : K100, K100N 3) Operates machine for 30 or 60 minutes before turning off 4) Automatically shuts down when water level is too low 5) Controls sauna temperature 6) Temperature high limit switch 7) With cleaning and draining function 8) High quality with 2-year warranty Outer packing: Carton dimensions: 4kW: 31.5 x 12 x 29cm 6-7.5kW: 42.5 x 15 x 42cm 9-12kW: 47.5 x 16 x 47cm