The PKI 4225 Wired Microphone Detector has been especially designed by PKI Electronic Intelligence GmbH for locating hidden wired microphones. In contrast to our various offered PKI wireless microphone detectors, the detection of such microphones is time-consuming and requires precision and endurance. Without being damaged, each line must be measured with our PKI detector, i.e. the clamp is attached to the suspicious cable and connected to the PKI 4225 Wired Microphone Detector and our laptop. With the delivered software, the pulses are represented on the screen and saved. An acoustic signal is briefly activated and recorded by the hidden microphone. This acoustic pulse is picked up by the microphone searched and converted into an electrical signal on the line. This again can be measured by means of our inductive coupling with the PKI 4225 Wired Microphone Detector. Should such a pulse be measured, utmost caution is advised and the search for the hidden microphone can begin.