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...

NOW AVAILABLE IN LIMITED STOCK!  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 a new, speech-like noise which,...