PLEASE NOTE: THIS ITEM TAKES UP TO 10 DAYS SHIPPING   It is well-known that sound permeates through walls, doors, water, windows and other constructions as well as through voids, cavities and ventilation shafts. This property of materials makes it...

PLEASE NOTE: THIS ITEM TAKES UP TO 10 DAYS SHIPPING   Designed by TSCM/countersurveilance professionals, will protect you against all types of eavesdropping when used in correspondence with the recommendations. Employs a new approach to the problem of conversation protection....