Door Alarm with Remote User Manual @ If the alarm is installed on the door, please install the magnet box on the frame of the door. If you install the alarm on the frame of the door, then install the magnet box on the door. Make sure that when the door is opened, the magnet box should be separated from the @® Wireless magnetic sensors of door/window security alarm, a high loudness alarm if open the door or window when it s not disarmed alarm, so that it can be detect and trigger alarm.