Feature 1Suitable for American standard trailer 2Adapts a 4-way flat vehicle socket to fit 7-way RV blade trailer plugs 37-way connects tail, brake, reverse, turn signals, brakes and auxiliary power 4Spring-loaded dust cover keeps connector clean when not in use 5Slit loom keeps wires contained and well protected Features: Suitable for American standard trailer. Adapts a 4-way flat vehicle socket to fit 7-way RV blade trailer plugs. 7-way connects tail, brake, reverse, turn signals, brakes and auxiliary power. Spring-loaded dust cover keeps connector clean when not in use. Slit loom keeps wires contained and well protected. Specifications: Item Name: 4 to 7 way Trailer Adapter Material: Plastic Color: Black Input: 6/12/24V Product Weight: approx. 205g Package Included: 1 x 4 to 7 way Trailer Adapter