Traditional oxygenerator is good but only one problem: it's not portable. People who are using it have to stay at home or hospital all the time, but people need to go out for fresh air! Beoka portable oxygenerator make it as pulsed oxygen supply with small size of 0.8L, which is equivalent to continious oxygen supply of 5L! The benefit of the pulsed oxygen supply do not just make it portable and easy to carry, it also makes it moist. Thanks to the sensor in this oxygenerator, only supply oxygen when breathe in and would not supply oxygen when breathe out.