Compact design features standard AC (alternating current) 125V (volt) receptacle with dual 2.1A (ampere) USB (universal serial bus) charging ports. Indicator light notifies user that device is charging. Automatic grounding system, thermoplastic top and back-body, and zinc-plated steel mounting strap. Durable injection molded housing and PVC (polyvinyl chloride) resin comply with UL94 5V flammability rating. Triple wide blade contacts and double wipe ground contacts to insure long-term retention. Built-in wire strippers, backwire clamps on side terminals, and tri-combo screw heads provide easy installation. Ultrasonic welding and integrated construction provide superior ground integrity, even under heavy use.