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Mini health breathe care Portable oxgen concentrator with battery

1. Airflow outlet: Approx 3+/-1.5L/min (standard atmospheric pressure)
2. Concentration:29%+/-2% (standard atmospheric pressure)
3. Power Consumption: average below 32W
4. Rated Voltage: AC 100-240V 50-60HZ or DC 12-17V
5. Noise: below 48dB
6. Lasting time of Battery for OX-08CR : 2.5hours
7. Lasting time of Battery for OX-08CR-2: 1.5hours