-12%
When the oxygen purity reaches or exceeds 87%, the green light illuminates. If the oxygen purity falls between 87% and 95%, the yellow light activates. The device operates with an input power of 400 VA, AC120VÂą10 voltage power, and features a pressure relief mechanism operational at 250kPaÂą25kPa. It is designed to address various health issues including respiratory, cardiovascular, and cerebral vascular problems, along with conditions like chronic obstructive pulmonary disease, carbon monoxide poisoning, and other hypoxia-related ailments.