USB Sock-IT EG8010 USB Wall Outlet is designed to solve the problem of too many electronic devices and/or not enough wall outlets. It also eliminates wasting money on phantom electricity costs and bulky chargers blocking the outlet. It allows your battery to last longer by not overcharging. The USB Sock-IT Plugin Outlet replaces your existing outlet and uses Smart Technology to charge any device from smartphones to tablets. It works by providing 2 USB chargers built right into the outlet that use no electricity when the USB doors are closed. The chargers use circuitry to sense a fully charged battery and then turn off. The USB Chargers measure how much current your device needs and will only give that much. With 2,100 mAh of power available, it will charge a Smartphone and iPad simultaneously. US Patent: 7997925. Measures 4-3/16-Inches High and 1-15/16-Inches Deep, UL Compliant (File: -E339607) 120 VAC/15A NEMA 5-15R Device Residential Grade. Package Size 4.5-Inches by 2.8-Inches by 2.2-Inches, 6.4-oz. Our objective is to offer consumers high performance electronic accessories for the demanding needs of the modern world.