... Motor: stepping motor, Lock Gear: Metal, Unlock Modes: Auto, mute. Key: ID card(em4100) Silent Electric lock performance integrationMaterial: Stainless ... : 1000Open the door: Magnetic detection, motor drive, automatic lock, muteVoltage: 12V DCInstallation: big left, right, inside and ... card EM4100 used as the key, and this section, there are emergency backup mechanical key lock, to avoid the case ...