@Grs Yes it will, if you replace the 3way switch that has power and neutral with the HS210.

@rols Yes it can.

@DigbyTheDog You should have a 3way===============4way===========3way. Just replace the 3way that has power to the switch and neutral in the box.

@Watektek The neutral should be a group of white wires in the box that are under a wirenut. Add the white wire from the switch to that group. If you don't have a neutral then you can not use the...

@Watektek Connect the power lead to the black screw and connect the load lead to one of the traveler screw. Connect the white wire of the switch to the white(neutral) group of leads.

@Blackduke6 Make shure the WiFi is set to WPA2 Personal, not WPA3