A Wi-Fi Smart Relay is an intelligent switch that enables users to control connected electrical devices remotely through a Wi-Fi network. Essentially, it acts as a bridge between a traditional appliance or system and the user’s smartphone or tablet. By linking the relay to a Wi-Fi network, users can send commands to turn devices on or off, set timers, and even monitor energy consumption, all from a distance. These devices are typically installed in line with the electrical circuit that powers the appliance, meaning they can control virtually any electrical device, such as lights, fans, heaters, and even large machinery.