Contec HC1A Oxygen Concentrator is a device token the molecular sieve as the absorbent, concentrated high-concentration oxygen (30~90%) by pressure swing absorbers(PSA) theory. It adopts an LED display, with the functions of concentrating oxygen, anion, nebulization, flow rate adjustment, timing, and remote control. The device is a high-performance product that features in compact and beautiful appearance, small noise, and energy-saving, with blue light. It can be applied in adjuvant therapy and health care for families and individuals.