Prevent unauthorized visitors from gaining entry to your home or business. The 300-Pound Electromagnetic Lock mounts to your point of entry, keeping your door securely closed until you release the powerful magnet manually through your hardwired security system. You can also control the 300-Pound Mini Maglock with a standalone RF transmitter and receiver system. A 12-volt power supply is required and sold separately. What's Included # Base w/36-inch hookup wire # Armature plate # Mounting hardware # Instructions When power is applied to the magnetic lock, it turns on the unit's powerful built-in electromagnet. This electromagnet is attracted to the steel armature plate, which is mounted on a door, holding the door fast against unauthorized entry. Ideal for cabinets, drawers, or small enclosures, an 80-Pound Mini Maglock is also available.