JSB Bi-Wire Call Point - can be used with Newlec - Alto - JSB Biwire Fire Alarms
For use with JSB - Newlec - Alto BI-WIRE Fire Alarm Systems ( similar the one shown in photo 4/5). Newlec BI-WIRE UBFP2ZBW, UBFP4ZBW, UBFP8ZBW. For use with the old obsolete Biwire System and not the newer Biwire Ultra.