The HUBBELL GFTWRST20BKU is a 20 Amp commercial-grade self-testing tamper-resistant duplex receptacle with a built-in GFCI (Ground Fault Circuit Interrupter). It is designed to provide electrical safety and prevent the risk of electrical shock in residential and commercial applications. This receptacle features a sleek black design that blends seamlessly with any décor. With its convenient self-testing capability, it ensures that the GFCI protection is functioning properly at all times. Trust HUBBELL for reliable and durable electrical solutions.