1、Advanced Security: Use wire drawing technology and double lock function, designed for building doorbell intercom system, the electric doorbell intercom door lock is very suitable for rental houses and security doors, to protect family and property security. 2、Multifunctional Use: The electronic doorbell intercom door lock can easily respond to a variety of door lock needs, not only to provide anti theft door electric lock function, but also to increase the building intercom system. 3、Dual Lock Control: Different from the traditional electronically controlled intelligent lock, this electric doorbell intercom door lock is equipped with a double lock mechanism to provide higher security and protection. 4、Smart Control: With the electronically controlled intelligent lock unit, users can easily complete the door lock switch operation through wireless remote control or mobile phone application. 5、Durable Materials: Doorbell intercom access electronic door lock is made of premium materials, durable and reliable, high strength and wear resistant, having long service time. Item Type: Electric Control Doorbell Intercom Door Lock Material: Iron Drawn Wire Unlocking Voltage: 12V Application Mode: Power on time does not exceed 3 seconds after power on unlocking. 1 x Lock 1 x Lock Core 13 x Screw 3 x Key 1 x Lock Ear 2 x Lock Cover 1 x Manual