C-559 Tune In On Telephone Calls

$39.95

Few people have even the slightest notion that their “private” phone calls over car phones, cordless phones and many other modern telecommunications devices are broadcasting out over the airwaves where they can be easily overheard by anybody. This book offers monitoring techniques, receiving equipment and antennas for best results. Also contains actual operating frequencies.

5-1/2" x 8-1/2", 40 pages, softcover, illus.