* The door wedge alarm is for indoor use only. * Set behind any door and when is opened it gives off a loud shrill pulsating alarm that scares away intruders instantly. * Insert the alarm at the base of your door, making sure the non-skid pad on the bottom of the alarm is in firm contact with the floor. * When the door is opened, the alarm's metal plate is depressed, which presses down the trigger anchor and sounds the alarm. * To silence the doorstop alarm, turn it OFF. * Alarm sound: 140dB. * With ON/OFF switch. * Use a 9V battery, not included * The door alarm gives great protection for home, office, or motel room when traveling.
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