Plug loads refer to electric power consumed by products through an ordinary alternating current plug socket.

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The pen has been designed to be compact and easy to use, you just plug it into a power socket and can start drawing anything within minutes.

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Attaching appliances to a power socket via a smart plug containing sensors and a ZigBee transceiver allows information about the appliances' power consumption to be beamed automatically to a broadband router within the home, and thence to a web server located elsewhere.

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