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Rj11 to usb-c conversation adapter recommendation

Mattboyd

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Matt
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Nissan s14 Toyota supra 2020LE
The previous owner had a radar detector installed. So I have the rj11 plug hanging from the mirror. ( It's spliced into the mirror housing/electrics).

My dashcam is a usb-c connection. Can anyone recommend a rj11 --usb-c conversion adapter? Reading on google apparently the radar detector is 12v and most if not all dashcams use 5v.

My dashcam does come with a cigarette lighter type connector and a USB connector. I would like to utilize the already available power supply from the rj11 plug though if possible.
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