The VISML1200LED magnetic door lock provides a strong sense of security with its outstanding holding force and significant features. The maglock is installed beneath the top of the door frame to make sure that the door remains closed and locked. With the VISML1200LED, you have up to 1200lbs of force protecting the door, which means it would take above 1200lbs of force to open the door if someone wanted to force entry into the door. The LED light on the maglock helps you identify when the maglock is locked and unlocked. When the light is red, the maglock is locked. When the light is green, the maglock is unlocked. This maglock has a 3 year warranty with full access to tech support in the USA!. (these products do not include a power supply)