A Leviton smart switch combines standard mechanical relay switching with advanced solid-state electronics and wireless transceivers (such as Wi-Fi or Matter) to control residential lighting. When you press the physical paddle or trigger the device via a smartphone app, internal low-voltage microcontrollers actuate a physical electrical relay. This relay closes or opens the circuit path between the incoming line voltage and the outgoing load wire leading to the light fixture, while continuously drawing auxiliary operating power from the permanent neutral wire connected inside the electrical wall box. Verification: Listen for an audible internal relay click when toggling the paddle, and confirm that the LED indicator light illuminates to show active power.
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