PCS SS1L/S switch compatibility

Sorting through my boxes of HA stuff from the last 20-odd years I found one NIB PCS SS1L/S UPB Switch and one NIB PCS SSR-W remote switch.
 
Anyone know if these can be used with the current PCS Pulseworx system?
 

That's not a UPB switch.  It's an X10 compatible switch.

OK. Wow. I must of bought them but have no idea why, I've never used X10. Thanks!