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 possible...

PLEASE NOTE: THIS ITEM TAKES UP TO 7 DAYS SHIPPING  Designed by TSCM/Countersurveillance 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. Uses...