oxygen concentrator OC-S30 w/timer for beauty 3L/min, purity 93+/-3%, Large LCD, steady concentration. CE0123, ... manufacturer of oxygen concentrator in Chinaoxygen concentrator OC-S30 3L/min w/timer for beautyLarge LCD screenGreat stability performanceLow ... (MPa)0.05-0.08Sound Level (dBA)standard type: 3L/min,≤42Operating Environment Ambient Temperature (°C)10-40Humidity Range (%)≤80Equipment ...