How does it dramatically reduce energy cost? - All USB chargers wall warts or bulit in stop charging once the device is charged. There a much nicer version of this type of built in charger avalible by Legrand , levition, and cooper to name a few. »
Designed to reduce energy costs dramatically, the U-Socket has a five-star energy-efficient design that automatically senses the required wattage and outputs full power only if something is connected. It's made in the USA and can be installed by do-it-yourselfers.
Designed to reduce energy costs dramatically, the U-Socket's 5-star energy efficient design auto-senses the required wattage and only outputs full power if something is connected. This USA-made product can also be installed by the do-it-yourselfer! — Ellen Wigginton