Fed Spec tamper-resistant single receptacles with USB charging capabilities are designed with strength and durability in mind. They were designed for the commercial market and are capable of withstanding heavy use due to their Federal specification certification. This product features an overall 2.1 A USB charging capability, auto clip, zinc-plated ground terminal screw, as well as triple-wipe brass contacts for lasting retention. The screw-pressure-plate back wiring makes installation fast and easy.