Ziqing Portable Oxygen Tubing, 2-9L/Min Adjustable, Suitable for Home & Travel Use, Complete Accessories

‌‌‌‌‌2-9L/minute, with a concentration range of 34% -93% (± 3%)； HD LED touch screen for easy and convenient operation； Purified output with ≤42dB low-noise performance (no disturbance to rest/work); 2-in-1 multi-purpose design meets various daily needs; Weighs only 11.9lb and features remote control for convenient use; Ideal for students, office workers and the elderly； Professional after-sales service, buy with confidence；