The 4-Way Light Tester with 12-Volt Circuit Tester is the quickest and easiest way to test 4-way flat trailer plugs on towing vehicles. Simply plug the light tester into your tow vehicle and the LED lights will illuminate to ensure all functions are working properly. The small compact design allows you to easily store in small spaces such as your glove compartment or pocket. Includes 12-Volt circuit tester.

• Quick and easy way to test 4-way flat trailer plugs
• Features LED lights
• Small and compact design is easy to store