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Hey Kevin, good question. It is mechanical, but as you can ask Google to mute, the mic can be muted independently of the switch by software. (In that case, to un-mute, you need to toggle the switch to mute then back again). Though I would strongly believe that the mic should not be able to be un-muted in software if the mechanical switch was in the mute position. (At least thats what I would have designed!)

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