There are four MEMS microphones — at the top of the card and on the left and right sides — plus a vibration conduction sensor (V.C.S.) inside the device, which is used for call recording.



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There are four MEMS microphones — at the top of the card and on the left and right sides — plus a vibration conduction sensor (V.C.S.) inside the device, which is used for call recording.


