The Medical Oxygen Concentrator Series JAY-10 comes with an optional nebulizer and a low purity alarm when oxygen purity is above or below 82 percent. The maintenance alarm sounds after 3000 hours of operation and for inside high temperature above 50℃. A fingertip pulse oximeter is available for monitoring patient oxygen saturation on site. It also has a small LCD display to show accumulating time, present working time and presetting time.