SLN Surgicals Medequip Oxymed Mini Oxygen Concentrator (5 L)PRODUCT FEATURES PSA ( Pressure Swing Adsorption ) Technology 36 Months Warranty Inbuilt Nebulizer and Timer, fplding lcd Intelligent Self-diagnosis System: Malfunction Information Display LCD Light weight,Compact,Easy to transport, 36 Months Warranty MORE INFOOxymed Mini Oxygen Concentrator (5L) new generation o2 separation system