Oyviny 7 Way Blade to 12V Power Adapter with LED Circuit Tester + 7 Pin & 4 Flat Trailer Plug Tester

Widely Use: 7 way cigarette lighter plug adapter works fine with any factory OEM 7 pin plug, suitable for Truck, Boat, RV, ATV, Chevrolet, Ford, Dodge, RAM, Nissan, Toyota, GMC and Jeep etc

• Multi-Tow Trailer Adapter: 7 way to 12 volt power adapter not only converts 7 way flat blade to a 4-way or 5-way trailer connector, also adapts 7 way into 12 volt power cigarette lighter socket; Note: This adapter doesn't work with vehicle has a lamp-out sensor
• 12V Cigarette Lighter Power Outlet: 12V power can be used to power air compressors, spot/flood lights, inverters, freezer, electric coolers in the back of your truck; Put 12v outlet where you need it, plug and play, much easier solution than running wires from battery to the truck bed
• 2 in 1 Design: This trailer light tester combines both 4 way circuit tester and 7 way trailer light tester, allows you to test both the 4 pin and the 7 blade connectors; Upgraded Double-sided design allow you to read the LEDs from both top and bottom sides; Note: This trailer tester does NOT work with vehicle has a lamp-out sensor
• Upgraded Double-Sided LED Indicators: 4pin & 7 pin trailer light tester designed with LEDs on both sides, Unlike the other testers only have one side leds, which make it hard to read; A great tool to help troubleshoot issues or verify you have install or fixed your trailer plug correctly
• Bright LED Indicators: Plug in 4 way and 7 way trailer light tester equips a LED light for each electrical function; Plugging the light tester and check, you can easily read the green LEDs and find out which wiring has a problem