The EWU242A Combination Tamper-Resistant Duplex Decora Receptacle and Dual-Port USB Type A-A Charger, Grounding,Side Wired & Back Wired.Employing a simple twist and lock wiring module to provide a safe and secure connection. These devices are pre-wired for 3x faster installations and 5x faster swap outs than traditional wiring. The speed and ease of it allows for optimal time, labor, and cost savings.