TopFeatured.com

I’m confusing about line2 from wall has 4 wires instead of 3? Line 1 and Line3 has only 3 wires. Line 2 is not 3-ways switch. What I know is only 3-way switch has 4 wires. My question is how do I connect to smart touch panel switch? That switch is different than regular switch. It combines all the live wires and go into L. Neutral wires go into L1, L2 and L3. I don’t know what to do the red wire from Line 2. Please help me solve my issue.

Added..

Thank you all for suggestion. I decided not to use it. Is there any switch out there I can turn on and off by remote control or something? because that switch is behind something, it’s very hard to reach. That why I bought this item which I can use by remote control.