What is the purpose of this automobile microphone

On Sunday, August 5, 2018 at 3:23:58 AM UTC-4, micky wrote:

I don't get it:

Pioneer CD-MC20 Auto-EQ Microphone for Car DVD Receivers

https://www.amazon.com/Pioneer-CD-MC20-Auto-EQ-Microphone-Receivers/dp/B0038PIGDW/ref=sr_1_6?ie=UTF8&qid=1533453067&sr=8-6&keywords=microphone+for+car#customerReviews


Why does someone need a microphone for a DVD receiver. Are people
doing karioke in the car?
I thought people want microphones if they are connecting the car
radio to the cellphone, but the ad doesn't mention cellphones.

And it says "Placement: The Pioneer CD-MC20 Auto-EQ microphone should be
placed in the center of your vehicle's driver seat headrest facing
forward. " So doesn't that mean if you're rear-ended your head will go
back and whack this thing, which has got to be worse for your head than
hitting the head restraint.

And what is it equalizing?

And, maybe the car's pre-owner wanted to record everyone who got into the car.