Oxygen Concentrator for Medical Use has breathing segmentation control and sensor to release oxygen when breathing in and requires voltage such as 12v, 220v/ 110v or battery. The Oxygen Concentrator requires battery power of 40a/ h and has dimensions of 290 X 188 X 100 mm and net weight of 3.9 kg. The Oxygen Concentrator has alarm that can be heard when breathing stops for more than 30 seconds and when battery is less than 10%. The Oxygen Concentrator for Medical Use has the feature that the accumulated working time of compressor is recorded and the system will remind of the maintenance or change of compressor after 15000 to 20000 hours of operation.