Product code: Hydrophone Monkey outlet Sound H27M
outlet Hand made and high quality piezoelectric hydrophone, robust and durable with 9 feet of high quality cable, can be used as contact microphone.
For optimal performance should be used with a Hi-z input or with an impedance transformer.
Listen it here the stereo version of the mic, http://monkeysoundmics.blogspot.com.es/2016/02/stereo-hydrophone-monkey-sound-h27s-in.html