Security Vision offers Egress or Release Switch. Security Vision manufactures AC power converters for cameras, DC power converters for cameras, RFID cards and readers, speed diallers, heat sensors, pan tilt units, speed domes, etc. The Egress or Release Switch is used to get the electromagnetic lock / electric door strike to unlatch the door from inside. The Egress or Release Switch is useful with stand alone systems that employ access control from outside to inside.