... alarm, thwarted alarm4. LED and sound reminder, low voltage alarm, emergent external power supply.5. Handle or hand chain card, waterproof, high temperature ... card), Manager card(general card), Waiter card, Guest cardParameter:Working voltage: DC 6V (a. 4 AA / 1.5 V x 4 ... . provide centralized power supply of small size lock body)Alarm voltage: < 4.6 VStatic power: < 1.5 uA Working current: 100MA ...