... ;CONTACT ID, ADEMCO4+2 communication protocol; Alarm receipt center,telephone,local alarm; Theree are five defense setting, defense, ... according to your need; Supply for220VA, can connect with monitor, 12V7AH battery, at most connnect 4 keybaord. ... to ring with telephone, blackout alarm in AC, defese and withdrawal switch with keyboard,trimming alarm and etc function. Engineering Wired Alarm Base