If the installation of the first in a series of Jasco Z-Wave devices didn't intimidate you then this one might. Many of your lights in your home will be controlled by more than one switch; these are 3-way and 4-way circuits. In order to control these you need to get one or more of the GE Add On Switches. Here we have the Z-Wave GE 12728 In Wall Add On Switch (Toggle style) and the GE 12723 Add On Switch (Paddle style).