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Of all the apartments and studios I lived in, I wish I had known about the PRESTO-ALARM. This battery operated wonder gives off a piercing 120 dB blast when a thief tries to jimmy the door. What's unique about the PRESTO-ALARM is its mercury switch. Unlike most alarms which do not sound until after entry, PRESTO-ALARM activates before penetration of the premisis. Any heavy banging or jiggling of the door from the outside will set the alarm off sending would be thieves on their way. PRESTO-ALARM is a self contained, 9 volt battery operated (not included) unit that attaches to any door with velcro (included). This product is also great for any RV owner, who wishes to have that added security when turning in for the night.
Price: $9.95
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