I purchased an HS200 switch because I saw I had a white wire in the box of my previous switch. Today I am trying to install it and see that I only have 1 white and 1 black wire. I assume the black wir

I would like to purchase and install a 3-way switch (HS210) in my house. I understand from reading Amazon reviews that I can install only one switch per 3-way circuit. I have also read that it needs t