Oxy-med Oxygen Concentrator is a unique stationary concentrator that delivers the features homecare providers want and patients deserve. It reduces operating costs with a design that is: 1. Lightweight - only 41.9 lbs. 2. Smaller and sleeker. 3. Easy to store and transport. 4. Low maintenance. 5. Quiet 6. Simpler for patients to use and maintain. Two years for any manufacturing defects. Features: Robust & Elegant look.PSA (Pressure Swing Adsorption Technology ) Flow Setting Continuous from 0 LPM to 5 LPM .Oxygen Purity of 93% +/- 3% at 5 LPM Standing Pressure (in kgf/cm2):95,Working Pressure (in kgf/cm2):93 Inbuilt Nebulizer Low & esay maintenance