VARON 3L/min Portable Oxygen Concentrator NT-03

Three Different Charging Options AC Power Supply -Home, work, or hotel room use DC Power Supply -Car use External Battery -Outdoor use   VARON Portable Oxygen Concentrator NT-03 Description   1. Suitable For Outdoor Use Tired of heavy oxygen tanks? The NT-03 is only 3.1lb, fits in its convenient carrying bag, and goes wherever you do. Enjoy the freedom to walk in the park, run errands, or travel without worrying about your oxygen supply. It is simple to use, lightweight, and reliable. The NT-03 is your oxygen companion for life on the move.   2. Replaceable Battery NT-03 comes with an external battery option! The standard 4-cell battery weighs just 0.67 lbs and extends usage time to 2.5 hours. For longer trips, the 8-cell battery weighs 1.06 lbs and extends usage time to 5 hours.Purchasing an extra 4-cell battery, up to 2.5 hours of battery lifePurchasing an extra 8-cell battery, up to 5 hours of battery life   3. Matches Your Breathing Experience Breath-Matched