Portable Pulse Oxygen Concentrator Build-in Battery

Feature: Up graded pulse flow settings1-5,equivalent to 5litres per minute of continuous oxygen flow. Mini size and light weight at only 1.98kgs. Easy-to-remove external battery. With a strong, comfortable shoulder bag. With rechargable battery up to 4hours. Application: It is the best choice for hypoxic patients when they go out for activities,travel or emergencies. It is also aperfect companion when working and traveling on the plateau above 2000 meters.