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 Introducing the VARON NT-03, your lightweight oxygen companion! Weighing just 3.1lb (1.4kg) and measuring 9.25*3.94*5.55 inches (L*W*H), this portable oxygen concentrator is a breeze to carry in its included carrying bag. Whether you're out for a walk in the park or doing your grocery shopping, the NT-03 ensures you can supplement your oxygen levels anytime, anywhere!  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