1Advanced Security: The electric control doorbell intercom door lock uses wire drawing technology to provide excellent damage resistance and protect the safety of the building. 2Multifunctional Design: The electronic doorbell intercom door lock is suitable for building intercom system, which can realize remote unlocking and management functions. 3Anti Theft Protection: With roller electric lock design, the doorbell intercom access door lock effectively prevent door prying and drilling attacks, providing additional anti theft protection. 4Durable Materials: Doorbell intercom access electronic door lock is made of premium materials, durable and reliable, high strength and wear resistant, having long service time. 5Easy Installation: The doorbell intercom access electric door lock has quick and easy installation process, suitable for DIY installation or professional use. 1 x Lock1 x Lock Ear2 x Lock Cover1 x Lock Core13 x Screw3 x Key Item Type: Electric Control Doorbell Intercom Door LockMaterial: Iron Drawn WireUnlocking Voltage: 12VApplication Mode: Power on time does not exceed 3 seconds after power on unlocking.