O2Life Portable Oxygen Concentrator Machine for Home Use, Oxygen generator, 1L-7L Adjustable, AC 220V/50 Oxygen Concentrator  (1-7L/Min)

【1-7L Oxygen flow adjustable】1L/m: 90%±3; 2L/m: 75%; 3L/m: 60%; 4L/m: 50%; 5L/m: 40%; 6L/m: 35%; 7L/m: 30%, HD LED Touch screen easy to read and remote control by far infrared.Production date May 1, 2021 【≤45dB Quiet】 The Oxygen machine is very low noise, less than 45dB, night use will not affect sleep, It works with or without water, no need to refill at night. 【Anion Function and Timing Function】 Built-in high frequency negative ion generator, The machine is equipped with a timing function (4 hours). 【AC power 220V】Power supply:220V±10%, 50Hz｜Input Power: 130VA (not battery powered), It can work 48 hours nonstop. 【Portable Design】 Outline size: 11.2in*7.4in*11.9in｜Weight: 15.4Lb｜Easy to move with convenient handle.