Need a hard wired intercom system

[ray23]

I have looked all over for this and I can't find it.

I need a hard wired intercom system.

I have a Garmin Zumo 450 GPS no blue toothe capability.

What I want to do is plug into the GPS it is set up for that, so I can get voice directions. I also w

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[daewoo]

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[ray23]

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[daewoo]

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[ray23]

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[daewoo]

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