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Zen-O Lite provides oxygen on demand using advanced technology. A constant pulse of oxygen is delivered each time the user inhales. This portable oxygen concentrator can deliver up to 1050ml of oxygen in pulse mode and has 5 flow settings. Zen-O Lite is simple to use with an intuitive button operation and LCD panel. The flashing indicator on your concentrator assures the patient that oxygen is being delivered each time a breath is detected. The device has a practical design which makes it easy for users or home oxygen providers to replace the sieve modules in under 5 minutes. Zen-O Lite is supplied with a 5-year device warranty, while all other accessories such as the bag, battery and sieve tubes are provided with a 1-year warranty.