OC-S100 10L oxygen concentrator for home care w/timer, large LCD, purity: 93+/-3%, Intelligent fault diagnosis. ... for medical use OC-S100 10L w/timer,for home care LTOT.Specification*Model OC-S100Operating SystemTimed Cycle/Rapid Pressure SwingPower ... change without notice OC-S100 10L oxygen concentrator for home care