Was wondering if Radio Shack is the only place to buy extra ones to add on to a dual window configuration. I went there I wanted them to match the ones that came with the package and also didn't know if i need a close or open switch. I would think closed??? Thanks, Jeremy
Closed when the magnet is next to the switch.
I believe switches are rated in their non activated state. So the switch is normally open and when activated by the magnet is closed.