... Heating System Ceramic Heater,4 pcs Type: Spa Capsule,Infrared sauna,Dry Sauna Control System: Inside control panel;Automatic digital control system ... centigrade,temperature sensor Door: Tempered Glass Warranty : heaters, sauna cabin, electrical components for 2 years ,Radio/CD for1 year ... . Sauna Voltage: 110V/220V Air system: Adjusable vents,Fresh ...