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Discourage intruders with these 2 Door Stop Alarms that set off piercing sirens when disturbed. Simply place the wedge-shaped Alarm under the interior of a door. When anyone attempts to open it, the Alarm emits a mega-loud siren that sounds continuously. Ideal for your home, but also an invaluable security tool at work after hours, as well as in hotel rooms while you're traveling. Wedge-shape design fits any hinged door; Adjustable high-medium-low sensitivity; No installation required; feather-light and portable; High-pitched 120-decibel siren; Use as door stop when powered off; Requires one 9V battery (not included); Measures 5 1/4 x 1 1/2 x 1 3/4"h., weighs 3 ozs. Get alarm-ed! Order these today! 2 Doorstop Alarms