Main Features: Easy to use: Simplified concise control system with intensive design,one-button start. Connect the charger to continuous working. no time limit. Small in size, easy to carry by trolley(Free backpack and trolley). Big LED screen, with anion function. Vehicle use available. Imported molecular sieve from the USA. Long time working, reliable, and safe. Three ways of power suppliers: Used in cars, used with a rechargeable battery, used with plug. Can be used 24/7 at home or on-the-go. Provide hours of safe, comfortable, portable oxygen.  Specifications: Model Number POC-05 Flow Mode Continuous Flow Delivery Rate  1 to 5 LPM Power Consumption  110W while charging Oxygen Percentage 40%-90% adjustable Weight 12 lbs (5.4 kg) Noise ≤ 43 dBA at any setting Dimension 260 mm x195mm x 387mm Lithium Lion Battery 14.8 VDC, 15 Ah (LiIon), 2.9 lbs (1.3 kg), Charge Time Is Approximately 4 to 5 hours per battery from fully discharge Battery Duration 110-120 minutes at 1-5L/M any continously flow setting