With the trailer plug adapter, you can easily connect and test your trailer's electrical system. This versatile tool is designed to work with a variety of trailer types, allowing compatibility and ease of use. Its compact size and lightweight design make it easy to carry and store, while its construction allows performance over time. Features -Color:Black -Material:Plastic and metal -Size:5.00X3.50X1.00cm/1.97X1.38X0.39in -Efficient wiring check: quickly connect and test trailer wiring, allowing all connections are -Multipurpose testing: the trailer connector adapter is capable of testing different trailer light circuits, allowing safe and operation -Simple to use: plugandplay design requires no extra tools, making it easy for anyone to operate -Innovative design: this trailer wire connector stands out with a uniquely designed tester that adds flair to your vehicle -Wide range of use: suitable for various vehicles and trailer connectors, providing broad compatibility Package list: 4 x trailer testers