Miniature fiber optic microphone. The system comprises of an advanced fiber optic microphone 1mm PVC & single-channel electro-optic unit, for digital-to-analog conversion of optical microphone output signals. The Single Channel is extremely compact. It features a pair of fiber optic connectors; a 3.5 mm socket for analog output & green LED voltage indicator. Unit is powered by external DC power supply (8-15V).