To measure, place one of the mouthpieces in the blowhole, then simply press the TEST button until the device switches on. The screen will show WAIT and count down from 10 to 0, then BLOW and C-C-C will be displayed. Take a deep breath and blow evenly..
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Kasutame küpsiseid, et tagada teile meie veebisaidil parim kasutuskogemus. Lisateabe saamiseks lugege meie privaatsuspoliitika.