I am attaching a picture of my current 3-way switch. There is also a ground wire inside the box (I need to add an extension. It is too short.)
The old switch has three wires connected to terminals, plus the ground wire equals 4 wires.

The HS210 has two wires (ground and neutral) plus three terminals (Line and two Travelers).

Questions:
1. Can I use the HS210 with the current wires in the box?
2. If yes, which wires go to where?

This is the BEST location for the HS210, but I can use a different 3-switch if I have to.

Thank you,

Ron

Remember there is a ground wire inside the box.