Introduction Heater(heating material): Nanometer carbon fibre. The thickness is only 2mm. Action spectrum: The light wave of far infrared ray : 6-14 um The radiation rate : 0.86 All the far infrared technical data has been through the inspection of the National Inspection and Detection Bureau. Uses high quality real tongue & groove inside and out,including solid hemlock fir and red cedar material imported from canada,no veneer panel with cuts that make the wood lood better value and prevent being out of shape With renowned and advanced speaker and car CD player,which brings your music to life while enjoying the sauna room . Uses knock down version (6 pieces )with easy assembly and break down in 5minutes without any tools. With TUVGS,CE and ETL approval to make it safer and more credible for use . Effects It can solve the following problems Reheumatism, reheumatism arthritis, sore waist and backache, Crick, quadriplegia ,osteoporosis,varicosity Dematophytosis,abscess,eczema,bedsore, Cold hands and legs