Maxxima 3.1A High Speed Dual USB Outlet Charger 15 Amp Duplex Receptacle, Tamper Resistant, Wall Plate Included 2 Vertical High Powered USB Ports with 3.1A Charging Capacity and Tamper Resistant Doors Smart identification chip-powered USB ports recognize the requirements of attached device and optimize charge accordingly Smart detection reduces charging rate when the total power needs of devices exceeds 3.1A to protect your devices. Receptacle Rating: 15AMP. 125VAC, USB Rating: Two USB ports with total 3.1Amp. 5VDC Wall Plate Included, Tamper Resistant, UL Approved, 1 Year Warranty