and i show a microphone listed in the installation guide, but i dont see it in the box. i wrote the seller who said the microphone is built into the unit so one isnt needed. are they right or do i need them to supply a microphone?

They're full of shit. You need a microphone.

Mic comes with the unit, time for some paypal dispute

thanks, i wrote them and they said they'd mail me anything missing but thought mic was part of the unit. i'll let them know they need to mail me the mic. thanks!!