Not sure if support is available
Not sure if support is available. trying to find out if you can buy more swab and in the anaerobic training, do you exhale in the device ? the manual says only to inhale.
Pierrot
美国
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美国
Not sure if support is available. trying to find out if you can buy more swab and in the anaerobic training, do you exhale in the device ? the manual says only to inhale.