Technical Parameters 1,Operating voltage: Four 6V high-energy alkaline batteries 2,Static power consumption: < 15μA. 3,Dynamic power consumption: 120~180mA. 4,Validity of Battery: Normally 8~12 months. 5,Low-voltage alarm: When the voltage is lower than 4.8V, it is still available for opening the door for dozens of times. 6,Open in Emergency: Under no con...