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"The Respironics EverGo is one of our top renting portable concentrators! It is a pulse dose machine that can go up to a setting of 6 and features the longest battery for pulse dose machines. You can get up to 8 hours of battery life on a setting of 2. It is a small concentrator that weighs only 10 and a pounds and is 6 inches wide by 8.5 inches high. It is also FAA Approved for airline travel on most flights."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.oxygenconcentratorstore.com/respironics-evergo-rental/>