The green light is on when the oxygen purity is at least 87%. The yellow light turns on when the oxygen purity is between 95 and 87 percent. It has an input power of 400 VA, AC120V±10 voltage power, and an operational pressure relief mechanism of 250kPa±25kPa which can be used to treat respiratory, cardiovascular, and cerebral vascular problems as well as chronic obstructive pulmonary disease, carbon monoxide poisoning, and other hypoxia-related ailments. High Oxygen Concentration: Delivers 87%–95.5% oxygen purity to provide effective oxygen therapy for patients with respiratory conditions. 5L/min Adjustable Oxygen Flow: Supplies up to 5 liters of oxygen per minute, making it suitable for a wide range of oxygen therapy needs. Intelligent Oxygen Purity Indicator: Green & yellow status lights provide instant visual confirmation of oxyg ...