The ZW15SM ON/OFF Switch is a perfect wireless manual and remote on/off control replacement of a regular wall switch, controlling incandescent, LED, ballast loads and more. This ZW15SM ON/OFF switch is fully compatible with other Z-Wave certified devices from other manufacturers and/or other applications providers and can be added to any Z-Wave network. As part of any Z-Wave network, each device can be remotely controlled by commands sent from Z-Wave controllers in real time, but each Z-Wave powered device also acts as wireless repeater transmitting RF signals from one to another, thus extending the range of RF signal all over the system. The ZW15SM Smart Meter Switch enables you to measure the energy usage of your appliance. The ZW15SM reports real time data to your gateway or controller. It can also display actual consumption (in W) and the accumulated power used (in kWh) in the user interface of the gateway. Please use the gateway installation manual for specific instructions on measuring the power.