A very sensitive Electronic Stethoscope Plus Non-Linear Junction Detector has been made to detect very weak sound of mechanical run back timers and electronic timing systems in improvised explosive devices e. G. Mechanical timing devices, Wrist watch, Analog type watch by crystal detection sensor. While it is also Non linear junction detector having crystal detection sensor for detecting the electronic circuits commonly found in improvised explosive devices and radio transmitters Wireless devices, e. G. Digital devices, Mobile Phone, Electric Circuit, Remote control devices digital watch and similar devices, that can indicate the presence of an improvised explosive. It can detect all above mentioned items through solid materials, such as walls, bricks, glass, plastic, concrete, inside the ceiling, wood, packing materials etc. For more details technical specification, feel free to contact us at any time.