YUWELL 8F-3AW AC220V 1L~3L/min Portable Small Household Oxygen Generator / Concentrator with Atomization 93% High Purity Medical Ventilator Oxygenation Machine Model: 8F-3AW Oxygen flow: 0.5~3L/min, 93% ± 3% The main raw material: UOP molecular sieve Noise: The positive noise is about 42db(A) Oxygen concentration: 93 %± 3% New weight: 11.8kg（25.96lbs Dimension: H50cm*W39cm*D24.5cm Maximum Outlet Pressure: 20～50kPa Input Power: 230VA. Power supply: 220V±10%, 50Hz. Package included: 1 x YUWELL 8F-3AW Portable Small Household Oxygen Generator Medical grade oxygen concentrator, Oxygen purity 93 %± 3%, oxygen flow 1-3L adjustable The unit is equipped with a nebulizer function and can be used by two people at the same time to inhale oxygen. Can work continuously for 24 hours. One year warranty. Accessories include nasal cannula, English manual, nebulizing inhaler accessories, remote control, filter. Due to Hygiene concern, no return will be accepted for this product.