Safety Technology International, Inc. STI-6402 105 dB Exit Stopper® Multifunction Door Alarm for Double Doors with on/Off Switch and 9 Volt Battery, red

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About This Alarm alerts to unauthorized exits or entries through protected doors Unit is completely self-contained and easy to install Sounds a powerful 95 or 105 db alarm when Act ivated May be mounted on top, right, left or next to almost any door Dimensions - 5 in. diameter x 1.875 in. depth Overview Color : 2 Brand : STI Power Source : Battery Powered Battery Description : Alkaline Number of Batteries : 1 9V batteries required. (included) Show more