Specifications Oxygen Flow 1L 8L AdjustableOxygen Concentration 30 93 Oxygen Generation Method Pressure Swing Adsorption PSA Anion Output 8 Million cm³Atmospheric Pressure 20kpa 70kpaRated Power 120WTiming Length 180 MinsRated Voltage AC110V 60Hz US Plug AC220V 50Hz EU Plug Display Control HD LED Touch ScreenOperating Noise ≤45dB A Atomization Rate ≥0 2mL MinMachine Size 36 x 19 6 x 34 3CMNet Weight 6 2KG 13 7LB 218 7OZFeatures Pure copper oil free compressor is low noise fast heat dissipation light and efficient 3000 hours continuous stable oxygen supply for 2 people at the same time France molecular sieve to produce stable pure and high concentration oxygen and the wear resistant ceramic separate valve to make the oxygen concentrator work stable for long time 20M 787IN 65FT infrared remote control for convenient rapid operation you do not need to get up frequently The working noise is only 55dB to ensure the most comfortable inhalation you can have a nice sleep in the evening Unique negative oxygen ion function can refresh the air to improve your health condition You can easily operate and check various datas on the HD LED display screen The humidification water tank is removable and washable to let you enjoy the continuous clean fresh comfortable oxygen Attentions 1 Machine should be in the ventilated places and the distance between the generator and wall other objects no less than 10cm 2 Please do not put anythings on the top of the oxygen concentrat