It's also compatible with any Honeywell wireless receiver when used in conjunction with a Honeywell Vista Series panel, like the VISTA-20P. Programming the 5818MNL to your L5100 is easy, and it's a simple way to protect doors or windows without detracting from your home's decor.
To install the Honeywell 5818MNL...
1. Drill a 3/4 inch diameter hole into the frame of your window or door at least 3 inches deep 2. The magnet requires a 3/8 inch diameter, 1/2 inch deep hole in the edge of the door or window 3. There can't be more than a 1/2 inch gap between the sensor and magnet, otherwise the alarm will trigger even when the door is closed