Hi,

I want to install a motion sensor wall plate switch by Cooper or
Leviton. Some of their models can we incorporated in a three way
electrical setup. The other switch would be a standard three way
switch.

I want to know, how all this will work?

I assume if you pass in front of the switch, the lights will go on.
Will it still do that is someone flips the other switch? Will the
motion one be disabled?

If the light is switched on by the manual one, will the lights be
turned off by the motion switch according to it's preset delay?

Regards,
Nicolas