Image 1 of 8 Image 2 of 8 Image 3 of 8 Image 4 of 8 Image 5 of 8 Image 6 of 8 Image 7 of 8 Image 8 of 8 THE BATT PLUG 12.0 £40.00 4 Pin XLR 12V Battery voltage checker.Reverse polarity protection.Pin 1 = GroundPin 4 = Positive Quantity: Add To Cart Added! 4 Pin XLR 12V Battery voltage checker.Reverse polarity protection.Pin 1 = GroundPin 4 = Positive