This Listen through the Wall Device could provide essential evidence for any private detective and private investigator as it can choose up even minute sounds, by way of a unique amplifier, by means of walls, windows or partitions. Attached to the amplifier is actually a highly sensitive ceramic microphone which is developed to choose up vibrations which are converted into a voltage which could be then be made into audible sound. The amplifier has an adjustment to allow the sounds to be heard clearly and at the needed volume.
Private detectives and private investigators can basically hold the device to the surface in question, as much as 300mm thick, after which listen in by way of stereo headphones. All of the evidence could be recorded by connecting a recording device, including an MP3 player, into an audio output socket. A 9 volt battery powers the listen by means of the wall device and will give private detectives and private investigators as much as 24 hours of use. This really is surely a very useful piece of kit for each private detective and private investigator.
http://www.privatedetective-walsall.co.uk