The Aqara Single Light Switch - No Neutral, from Aqara, is a ZigBee Light Switch. with Metering
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Unlike some of the other types of switch, the Aqara Single Light Switch - No Neutral does not require a dedicated neutral line. This is ideal for most establshed UK homes, because most of their wired light switches do not have a neutral line.
These light switchs are little more than a direct replacment for existing light switches, even those installed decades ago!