This AC WORKS brand orange locking adapter is very durable with a compact design. It is a NEMA TT-30P to NEMA L14-30. The NEMA TT-30P is a 30 Amp, 3-prong RV male plug. The NEMA L14-30 is a 30 Amp, 125/250-Volt, 4-prong locking female connector and has two hots bridged. This product contains nickel-plated pins and terminals to prevent rusting, and a power indicator light. The maximum operating power is 3750-Watt. Included with your purchase is a 5-year limited warranty.