What does a duplex receptacle typically include?

A duplex receptacle is designed to provide two outlets within a single unit. This is a common component in electrical systems, especially in residential settings, allowing users to plug in multiple devices simultaneously without the need for multiple receptacle units. The term "duplex" refers to the two-port configuration, which makes it a practical choice for households and office spaces where the need for power access is high. Therefore, the correct answer highlights the purpose and functionality of this type of receptacle in electrical installations.