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.