What is a 3-way switch used for & why would you need to install one?

A 3-way light switch can add convenience to large rooms, staircases, or any space where you may want to control the light ...
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How to Install a Smart Wifi 3-Way Light Switch

Learn how to install 3-Way Smart Wifi light switches with this step-by-step video. Consult a certified electrician if you have any questions or concerns, as every wiring setup is unique. This video ...