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This is a supplementary medical device and NOT intended to be used for ANY prescription purpose.If need MEDICAL machine pls search B07BCR429RSupport continuous oxygen throughout the day,can continuously work 24 hours
Power Supply: AC110V ONLYif need 220V, pls leave us a message
Car Adaptor and Battery included, Battery last for 2 hours
1L/min:90% purity, 5L/min:30% FOR Buyers from California pls search B07BH19ZXC