Publisher: OPT7. [INSTANT CHECK & RESULTS] Easily check your connection status with our adapter - know instantly if your OPT7 product(s) is connected or not. [UNIVERSAL COMPATIBILITY] Give your rig the ability to light up any trailer, camper, or accessory without any difficulty.
The OPT7 7 Pin to 4 Trailer Adapter is perfect for RV enthusiasts who need to convert a standard 7-pin trailer cable to a 4-pin electrical outlet for their RV's electrical system.
