The Cooper Wiring Devices TR7746BK-BOX 20-Amp Combination USB Charger with Tamper Resistant Receptacle and Box is a standard AC duplex receptacle with 2-USB charging ports rated 2.1A. The dual USB charging ports charge most compatible electronic devices that charge with a 5-Volt charger adapter. There is an LED indicator light, which notifies user that device is connected. Includes 3-pre-stripped 6-inch wire leads for line, neutral and ground for quick and easy installation. Automatic grounding system eliminates need for bonding jumper in grounded metal enclosure. Also, provides redundant measure of ground continuity where jumper is used. The steel-mounting strap is zinc plated for added corrosion resistance. Replaces any standard duplex receptacle with the thermoplastic top and back body, which are virtually unbreakable for a number of years of durable performance. The Cooper Wiring Devices TR7746BK-BOX 20-Amp Combination USB Charger and Tamper Resistant Receptacle is compliant with 2011 NEC Article 406.12 that states that all 15-Amp and 20-Amp, 125-Volt receptacles installed in dwelling units must be tamper resistant. Whether a home's style is traditional, modern, casual, cozy or rustic, it will demand more from wiring devices than in years past. Cooper Wiring Devices is dedicated to providing the up-to-date wiring device solutions; solutions that increase energy efficiency, increase productivity, promote safety at work and in the home and produce reliable performance. Cooper Wiring Devices is a trusted name in electrical products for over 175-years.