Portable Oxygen Concentrator 5L High oxygen purity level 96% 5 L OXYGEN CONCENTRATOR Flow rate 0-5L/min Oxygen purity 93%~98% Outlet pressure 0.04-0.07Mpa Mode : Continuous Noise level : ≤45db Power Supply AC220V(±10%), 50/60Hz (±1Hz); AC110V (±10%), 50/60Hz (±1Hz) Power consumption : ≤85W Power failure alarm