V-Plex Programmable Overhead Door Contact. Rugged aluminum housing and adjustable L bracket type magnet. Standard gap: 2'' (51mm). 24'' (61cm) armored cable. Epoxy sealed for protection from moisture and impact. Programmed from VISTA keypad. Switch Type: Form A (SPST) Reed. Contact Rating: 100ma @ 28VDC. Honeywell Exclusive: Patent polling loop technology