Garmin Microphone does it work?

Ok I have a Garmin nuvi and it appears to not be bluetooth but there is still a mic built in. If it can’t connect to my buzz (I know this because there is no bluetooth option under tools) is there any use for it? If there is can you please tell me how to use it…
if it is possible to use my cell buzz with this gps can someone tell me how to set it up

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