The Olympus ME-15 microphone is a small, lightweight tie-clip microphone that can be conveniently clipped to the tie or collar. The microphone can also be fixed under a jacket or shirt for easy concealment. The ME-15 is an ideal accessory for Olympus digital voice recorders. The mic's cord is 3.3-feet long and the entire unit weighs only 11 grams. A tie pin-type clip is also included with the microphone. Note: When using the ME-15 with Olympus Pearlcorder microcassette recorders, you will need the Olympus PA-1 plug adapter (sold separately).Digital voice recorders provide great solutions for voice recognition applications, however background noise will sometimes cause a problem. The ME-12 plugs into your digital recorder's 3.5mm microphone jack for uni-directional recording in high-noise environments. It will cut down on much of the background noise and result in a more accurate transcription.