Oxystar Oxygen Concentrator is designed to provide supplementary oxygen to patients diagnosed with oxygen therapy. It delivers a high concentration of oxygen and is used with a cannula to channel oxygen from the concentrator to the person. It is perfect for home and institutional use. Uses: It is used to deliver supplementary oxygen to patients diagnosed with oxygen therapy. Product Specifications and Features: Sound Pressure Level: 60dB(A) Maximum Flow: 1L/min Ideal for home and institutional use Gives supplementary oxygen to patients diagnosed with oxygen therapy Directions For Use: Use as directed on the label. Safety Information: Read the label carefully before use Store in a cool dry place away from direct sunlight Keep out of reach of the children Avoid physical damage This product is non-returnable.