VARON Portable Oxygen Concentrator NT-05

7 lbs Product Name VARON Oxygen Concentrator NT-05 Oxygen Flow Rate 3L/min Oxygen Concentration 30%±2.5% Oxygen Mode Continuous Power 25W Size 9.25*3.94* 5.55 (L*W*H) Inches Weight 3.3 Lb Rated Voltage AC100V-240V/DC 12V~16.8V Battery Pack Capacity 2500mah 14.8V,maximum voltage 16.8V Battery Lasting 2 hours, rechargeable battery 2200 mAh Battery Weight Included in the package, are 0.67lbs (0.28kg) Four Levels of Timing 20 minutes, 40 minutes, 60 minutes, 120 minutes Operating Noise ≤52dB