The input voltage of this product is written as 12-15v.　However, it actually did not work unless it was 13.2v or higher.　I purchased it, thinking it would work at 12V, but I can't use it as it is.　On the way, I boosted it to 15V via a DC-DC converter, and managed to use it.　I had a hard time because the space was just barely.　Also, one of them has the speaker output terminal installed in the opposite direction, so I can not connect the wires.

The input voltage of this product is written as 12-15v.　However, it actually did not work unless it was 13.2v or higher.　I purchased it, thinking it would work at 12V, but I can't use it as it is.　On the way, I boosted it to 15V via a DC-DC converter, and managed to use it.　I had a hard time because the space was just barely.　Also, one of them has the speaker output terminal installed in the opposite direction, so I can not connect the wires.

The input voltage of this product is written as 12-15v.　However, it actually did not work unless it was 13.2v or higher.　I purchased it, thinking it would work at 12V, but I can't use it as it is.　On the way, I boosted it to 15V via a DC-DC converter, and managed to use it.　I had a hard time because the space was just barely.　Also, one of them has the speaker output terminal installed in the opposite direction, so I can not connect the wires.

received in good condition

received in good condition

received in good condition