There a situations where you might like to have a two way or three way set up for a hallway light (i.e. 2 switches controlling the same light). Smart switches like these won't work like you would expect in a traditional set up as the unit is powered always on and the switch controls power to the light. A work around is to wire one smart switch to the light and the other smart switch as powered only. Set up an Automation via the Smart Life app which activates both switches on when one switch is activated and turns both off when one/either is turned off.
It is a little hard to explain but here is a video that explains the fundamentals, it is a UK example but the fundamentals are the same. I'll update this post when I have a better example.
Update: The Smart Life App also has 'Multi-Control Association' which is a quicker way to associate multiple switches to the same function. Found under the switches device settings in the app.
Cheers LukeFeature image Photo by Sarah Pflug from Burst