"There is a relay inside the plug which turns the power on and off, as well as a small circuit that connects to a dedicated hub or Wi-Fi. When you send a command via an app or voice assistant, it is transmitted to the plug through your network, and the relay either opens or closes the electrics circuit. "In simple terms, it replaces the manual act of pressing a switch."
"Whether you're lying in bed and want to pre-heat the coffee machine, or sunbathing on holiday and want to double-check the hair straighteners are off, the best smart plugs can save time, energy and stress and can be used in standard electrical sockets. Below, the experts explain what a smart plug is, how they work, and whether they'll drain your electricity and Wi-Fi while in use. You'll also find the pros, cons and top-rated products to help you decide if it's right for your home."
A smart plug is a small switchable adapter that connects between a wall outlet and an appliance to control power supply. A relay inside the plug turns power on and off and a circuit connects the device to a hub or Wi‑Fi. Commands sent via an app or voice assistant travel over the network to switch the relay, enabling remote control. Smart plugs allow pre-heating, remote shutdown of appliances and monitoring to reduce energy waste. They can save time and stress by eliminating the need to return home to check devices and can be used in standard sockets.
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