Alarm/Off/Chime slide switch
Built-in siren or chime modes
LED low battery indicator
Can use on a variety of items
Alarm sounds at ~115 dB
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TECHKO's Safety Guard Alarm is both simple and effective. No tools or mounting required. Just hang from your doorknob or an object, the alarm will detect vibration from movement. Requires (3) 1.5V AAA batteries (not included), contains one Safety Guard Alarm.