This powerful electromagnetic lock boasts excellent holding force and unique features. This mag lock does come with a built-in door contact, meaning this can function both as an electric lock to control access to a door as well a sensor to monitor the status of the door. With its powerful 1200lb holding force, compact durability, silent operation, and CE/PSB quality test compliance, this is an ideal door lock for any access control system. 12 VDC or 24 VDC dual voltage Low current consumption Reliable holding force of up to 1200lbs Hall effect sensor monitoring output Green/Red LED Indication Built-in magnetic contact for door status monitoring Cosmeticize anodized aluminum casing Surge and spike protection PCB Anti-tamper jam nuts Compact size for small doors, cabinets, etc. Anti-residual magnetism kick-off button