Our OLV-C1 Portable Oxygen Concentrator is suitable for white-collar workers with bag,trolley, inverter and 2 hours battery. This machine is a new type of equipment that extracts oxygen from the air. It uses molecular sieve physical adsorption and desorption technology to fill molecular sieves in the oxygen generator, which can adsorb nitrogen in the air when pressurized. The remaining unabsorbed oxygen is collected and purified to a high purity oxygen. The main components include air tanks, air compressors, freeze dryers, oxygen generators, and oxygen tanks.