... 6V.The alarm point of low-voltage is 4.8V.Main Material: steel, brassService Durability: ... card, master card, multilayer card, floor card, guest card, staff card, backup card, temporary card, report lost card, terminating card, authorized card, cipher card, room number card, clock card, clear card ... time6 secondsAntistatic interference ability≥-15KVLow power alaarm 4.8V±3%Door not closed alarmLock will ...