... Exterior) Heating System Ceramic Heater Type: Spa Capsule,Infrared sauna,Dry Sauna Control System: Inside control panel;Automatic digital ... transom, no stuffy at all Certificates: CE ,ROHS,ETL Structure: Completely free standing ... long forever. 2).Nano carbon fiber far-infrared heating board, foot heating board Compared ... on refreshing the brain , relax the body, relieve pressure and fresh air. 4). ...