1.High oxygen concentration 2.PSA method 3.CE& ISO Approval ... funtion and model for reference Feature:1. Physical oxygen making2. The oxygen purity can reach to 93%3. With remote ... function, trouble display, accumulative time, timing, nebulizer and oxygen purity displayStructure:HL-3X series Function:OEM Service:If you ... machine yourself, we can provide the main accessories! Portable PSA Oxygen Generator