A highly sensitive wired microphone to receive the minutest signal of the target room with absolute clarity. This unit is an advanced version. It has an enhanced electronics box with built in battery, volume control and two analog outputs, one for headphones and the other a fixed, high gain audio output for recording or a data analyzer. This unit can be used in environments where external power is not available, through its built in 9V battery. It can also be powered externally using AC Mains. Our unit are also supplied with built-in DSP based Noise Cancellation Circuits, which reduces the noise level upto large extent. Immunity to EMI/RFI Most difficult to detect Immunity to high voltage Can run to any length (1KM) Immunity to highly explosive areas Passive microphone (sensor) Point-to-point communication