Review on Xtenzi EU Vehicle Antenna Amplifier Adapter XTDIN12: Compatibly Designed for Select European Car Radio Models. by Joseph Mathis

Product arrived on time. No instructions. You guessed it, the blue wire goes to 12V ACC. Built-in radio. I turned on the radio but couldn't find any stations. I removed the radio from the dash, opened the adapter tube and found poor soldering on both coaxial contacts causing one to move away. I cut and stripped and re-soldered the coax cable. Now it works fine. It's hard to believe someone in QC with eyeballs went through that. I would return it but I was dying to finish the install.