Cooper TR7740W-BOX Electrical Outlet, Combination USB Charger/Tamper Resistant Receptacle, 2-Pole 3-Way - White Allows for charging electronic devices without a computer or special adapter. Save up to $31 per year in electricity by charging your phone with a USB outlet over a traditional charger. Replaces existing standard duplex receptacle. Includes Tamper Resistant shutters for 2011 NEC Compliance.