Brand new Olympus ME12 Noise cancelling plug-in microphone ref/365/am/ey Reducing background noises To improve voice recognition application The ME-12 simply plugs into your digital voice recorders microphone jack for uni-directional recording in high noise environments. It reduces ambient noise and improves transcription accuracy when using voice recognition software. Sensitivity of 68 dB and frequency response from 200 - 5000Hz With its 3.5 mm plug, it is usable with all digital voice recorders using the DSS file format