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I'm using these switches in a 4-way setup. I recommend looking on YouTube for instructions as the ones it come with really are lacking unless you are an electrician. I consider myself handy and was able to learn pretty quick. I'm using these with a Smartthings hub, which took a little while and a few tries to get it to recognize the switches, but not the switches fault, probably my network.
Posted by donatello
Make sure your router is close to the switch. I had to move my router to get to work reliably.
Posted by Bill
this add on is easy to install if you have the main switch already installed that is wifi capable
Posted by mkb3
Customers consistently note the ease of use and simple installation of the Z-Wave In-Wall Smart Add-On Toggle Switch. They particularly appreciate the ability to schedule on/off times. The product's affordability compared to competitors is also highlighted. No significant drawbacks were reported by customers.