"We issue credit cards. Sometimes the credit
cards are returned. Recently some were disappearing from our building
after having been returned."
I set the SR-71SP above the ceiling
tile, putting the Wireless Mercury Switch in one of the "Returned
Envelopes". I programmed the SR-71SP to record only after 6.00 p.m.
and before 7.30 a.m. Or any time over the weekend. Within these times it
will only record when the envelope is moved.
I ran the whole system off a 7
Amp/Hr. Battery, only having to change it every 10 days.
"It didnt take long to get a taker! I only had to
review 20 minutes of tape - all relevant to the case."
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