Lovego 5 Liters portable oxygen concentrator LG101 with two batteries(Blue) Features: Model: LG101 Oxygen Flow: 1 to 5 liters continuous oxygen flow per minute (1 to 5 LPM). Work in 110V or 220V electricity power supply. Work in car 12v cigarette lighter and by its battery. It weight 5.4 kilograms. The Lithium ion battery is rechargeable. The fully charged battery could support machine 1 hour from 1 to 5 liters. The standard package include: 1 oxygen concentrator, 2 batteries, 1 battery charger, 1 car inverter, 1 nasal cannula, 1 head style tube, 1 humidifier cup, 1 spare filter, 1 carry bag, 1 trolley. Attention: This model is suitable for patients who need 1 to 3 liters oxygen. If your oxygen prescription is 3 to 5 LPM, please choose our model LG102 portable oxygen concentratorGBA oxy-tech Co.,ltd