Narva 7 Pin Flat Trailer Socket with Heavy-Duty Connector, 1 Year Warranty Built with the camping and caravan enthusiast in mind, this product is equally suitable for anyone that frequently tows vehicles requiring battery maintenance to the trailer, caravan battery, or power for equipment operation The 7-pin trailer plug delivers power to operate the standard stop, tail, reverse, indicator, and license plate light, whilst the built-in HD battery connector delivers up to 50A of power to the battery to charge, maintain or power equipment like a fridge for long journeys Features: Super slim moulded housing which incorporates the common 7 pin flat socket with the addition of a 50A heavy-duty battery connector Easy to mount and compatible with the standard mounting plate on most common tow bars Includes silver-plated copper contacts to suit 8mm2 (8B&S) cable