Thera Sauna is the only infrared sauna in the world with a patented onboard computer system for constant infrared emission. It uses a safe, radiant FAR infrared heat source that penetrates up to 2. 5 inches below the skin surface to deep heat muscles and joints that induce profuse sweating and thereby detoxifying the human body. The Patented Stable Heat System produces consistent 9.4 microns of infrared to provide more health benefits like sleep, relaxation, detoxification, weight loss. It also improves your sleep, circulation, and relieves health conditions such as arthritis, sore muscles ,and helps with chronic fatigue syndrome. Product features: Uses aspen hardwood, which is hypoallergenic Uses high glass content solid ceramic TheraMitters™ that meet or exceed manufacturer specifications to provide the best and most beneficial levels of infrared Micron Power Select™ allows you to vary the infrared output from each TheraMitter™ zone and control the infrared micron range during your sauna session TheraSauna® full spectrum saunas meets the electrical requirements to be ETL and CE certified in the US, Canada, and Europe. TheraSauna® full spectrum saunas emits very low levels of EMF, compared to the high levels of EMF produced by saunas using less efficient carbon fiber materials and rod TheraMitters™. TheraSauna®'s parent company, QCA Spas, is the only certified American manufacturer of far infrared saunas and has been in business since 1966 Therasauna TS5753 2 Person Plus Infrared Sauna features: Dimensions: 58.5" W x 50.5" D x 78" H Wood: Non-toxic Aspen Wood Controls: Patented MPS 7 Day Programmable Touchview Control Heaters: 10 Solid Ceramic TheraMitters Backrest: Ergonomic, Contoured Backrest Bench: Reversible Bench (Flat & Curved) Door: Smoke Glass Door with Two Side Windows and TheraSauna® Logo Electrical: Plugs into 120 Volt / 20 Amp Outlet Watts: 1531 watts Exterior: Warm Mahogany Clear Seal Finish or Natural Aspen Finish Interior: Tongue & Groove Interior Light: Elegant, Dimmable Sconce Light, 60 Watt Bulb System: Patented StableHeat System™ Vent: Ceiling Vent Meets/Exceeds ETL and CE safety requirements Capacity: 2 Heater Type: Ceramic TheraMitter Heaters: 10 Lighting: Standard