Home › Questions › I currently own an Avon S10...
•The filter has expired•The mask was produced in 2001•The sound is only emitted when I exhale.
Sounds like the normal function of the mask. There is a small plastic flap that releases every time you seal the mask and this popping sound is the result of that small apparatus functioning. By the way; change the filter.
Thanks, mate.
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Thanks, mate.