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How long are these devices can be used?
The use time is determined by the breathing pattern of the individual and the model of the cylinder.
For example:
1、S300 Series:About 6-10 minutes;
2、S300Plus Series:About 8-12 minutes;
3、S400 / S400Plus Series:About 12-16 minutes;
4、S500 Series:About 10-14 minutes.