I currently have a 3-way switch setup which is made up of two 3-way switches to control a hallway light. Due to oversight, an additional (4-way) light switch is much desired in the middle of the hallway.
The cost of opening up the wall and rewiring the 3-way circuit to accommodate a new 4-way switch is prohibitive.
The wiring is new and all the switches have neutral. I am wondering if there exists a wireless switch (looks like a wall switch but without wires behind) that can be used to toggle another 3-way switch over wireless such that I can have a 4-way setup.
I have looked at several products. Many of the so called "wireless 3-way switch set" is really a wireless controlled single pole switch that turns existing single switch into 3-way.
Here is an example of such "fake" 3-way: https://www.amazon.com/SK-8-Wireless-Anywhere-Lighting-Control/dp/B0052ROEB2
Does it exists a set similar to above but replaces a 3-way switch?