Amazon, if you have a auto dim mirror should be a wire plugged in back, little finger clip on top. My garmin says the cable ( from garmin gps) will not charge this device but it is. From what I can decipher from their website it does but not as fast. It’s stayed fully charged for 2 days now...
Used this to power my dash cam, plugs into back of mirror, mirror wire plugs back in plus it has a USB port I switched dash am to USB instead of the long 12v plug