Duplex outlet with 2 usb recharge ports, 20 A, 125v, NEMA 5-20r, usb 3,1 A. 2 Poles, 3 Wirings. Dual USB charging ports charge most compatible electronic devices that charge via a 5V charger. Safety system prevents insertion of foreign objects. Replaces a standard duplex receptacle.These devices are designed for maximum charging efficiency and have the ability to charge up to two USB powered electronic devices at once, leaving the outlets free for additional power needs. 2 years warranty.