Description:100% brand new and high quanlityThis12V 7 Pin Tester is designed to indicate a failure in the wiring on your trailer， caravan or horsebox with a six light LED system. Quick， easy and very simple to use. Just plug the tester in the 7 pin socket or the 7 pin plug of the trailer / caravan and press the yellow button on the side of the tester. If the wiring is good， all the LEDs light up. Makes the checking of the wiring of your car， trailer， caravan and horsebox easy .Applies to 7-pin trailer plug and socket connector (N-type ) test.9v battery not included .Color: BlackSize(approx): 17.5 x 5 x 4.2cmMaterial: Plastic，CopperWeight: 190gCondition: Brand NewPacking Including: 1 pcs x Trailer tester.(9v battery not included);1 X English ManualMeasure conversion: 1 inch = 2.54cm; 1cm = 0.393 inchesNote: Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same .