Or flip a switch at the bottom of the stairs, and then again at the top. The next person, coming from either direction, must be able to turn the light on again. That's where 3-way switches come in.

Add/Relocate 3 Way Switch without Rewiring - Simply wired between the power and lighting fixtures; no complex in-wall rewiring or WiFi needed to add/relocate switch, pre-programmed for immediate use.

It supports single-pole and 3-way wiring, allowing you to upgrade your lighting without replacing every switch in a circuit. Like other Eve switches, the Eve Dimmer Switch requires a neutral wire ...

The hardwired switch will ship in mid-March for $49.95 and works with single-pole and 3-way configurations. Matter over Thread support means it works with Apple Home, Google Home, Alexa ...