The 16A circuit breaker with built-in electricity meter is a combined on / off switch and power monitor. The on / off switch allows you to disconnect devices that otherwise would consume power when not needed. This can be very useful if you wish to save energy as well as the environment. The Switch can be controlled either locally or using a Z-Wave controller. The built in electricity meter measures the power consumed by the attached load in watt. It also keeps track of the accumulated usage in Kwh.The information can be retrieved using the Z-Wave protocol and can be used to build graphs, compare usage, etc. This functionality helps you get a clear picture of which devices uses power and how much. The detailed usage information gives you the information needed to start saving energy effciently and gives you the benefit of remote control.