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This Listen via the Wall Device could provide vital evidence for any private detective and private investigator as it can choose up even minute sounds, via a unique amplifier, through walls, windows or partitions. Attached to the amplifier is really a highly sensitive ceramic microphone which is designed to choose up vibrations that are converted into a voltage which might be then be made into audible sound. The amplifier has an adjustment to allow the sounds to be heard clearly and at the required volume.
Private detectives and private investigators can simply hold the device to the surface in question, up to 300mm thick, after which listen in by way of stereo headphones. All of the evidence can be recorded by connecting a recording device, for example an MP3 player, into an audio output socket. A 9 volt battery powers the listen through the wall device and will give private detectives and private investigators up to 24 hours of use. This is surely a very helpful piece of kit for every private detective and private investigator.
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