1981 - Volume #5, Issue #3, Page #26
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Alarm Stops Prowlers Before They Can Enter
New from Energy/Alert is an automatic door knob alarm that goes off when the knob is touched by an intruder, stopping would-be prowlers before they can enter.
The Energy/Alert alarm is battery powered and hangs on the inside door knob. The instant a hand touches the outside knob, the alarm goes off, sounding for ..........


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1981 - Volume #5, Issue #3