This is fact is a good question.
And the answer will depend on what country you plan to install the smart light switch on, let me explain.
According with the EU (European Union), electrical regulation, there is no need for a neutral wire, but thing is a way different if the switch is going to be installed in the United States of America where a neutral wire is needed.
The good news is that th Kancy Smart light Switch comes prepared with a socket for a netral wire, so no worries, you can install this switch everywhere.
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