4 Way Trailer Light Tester $16.09 Brand Undisclosed Type Circuit Tester Measuring Technology Electric Features LED Indicator, Portable Material Metal, Plastic Color Black California Prop 65 Warning California Prop 65 Warning Unit Quantity 1 Unit Type Unit UPC 789610770090 condition New No batteries required Plugs into 4-way flat tow plug Indicates if tow circuit is properly configured Listing and template services provided by inkFrog