This product combines a USB charger with a tamper-resistant receptacle. It offers 2.1 amps of power with the capability to charge two USB-powered electronic devices, leaving the receptacle free for other uses. The company says the USB ports incorporate a smart chip that recognizes and optimizes the charging power of the device being charged. Leviton. 800-323-8920. www.leviton.com. Booth No. C3549.