Rearview mirror cam kit

[Concurser]

Any indications on a good rearview mirror cam kit?

My car has no rear cam. I am looking forward a rearview mirror cam to place it over my current rearview mirror.

Some requirements:
1) No need to use USB or 12v power adapter, being wired directly from the trunk plate backlight.
2) Front cam to be used as a regular dash recorder.

I have found some models but not sure which one is a good one.

Thanks,

Concurser