ANGEL-5SB is a AC, DC and Battery operated style rechargeable 5liter oxygen concentrator. It can work 2 hours continuously without AC power. And it is also the first and only 5lpm oxygen machine that can run with inner-built battery while providing 93% oxygen in the world nowadays (2020). 5Lpm Big flow and without worrying about AC power cut off issue that have made possibility for copd people to do oxygen therapy when transiting from home to hospital, or let them go free outdoor activities with sufficient oxygen supply, or when city power cut off without pre-informed.
Its main features are including oxygen & nebulizer function, Timer, child lock function, low oxygen alarm, 6 safety alarm functions, 6 kinds of error indication functions and a 6′ LED display. When set the flow at 5Lliter per minute and the oxygen concentration will grow fastly till 95% within 3 minutes.
Furthermore, if the inner built battery is run out, a standby battery can be replaced immediately to keep the machine running another 2 hours. Thus 4+ hours are available.