Switchable preamp included. (AA batteries are included. Batteries must be installed for preamplifier operation.)
Freq response: 150Hz - 10KHz [preamp off] 200Hz - 7KHz [preamp on]Compatible with Kenwood radios using round 8 pin mic connectors. Can be used with some Kenwood RJ-45 equipped radios, by using MJ-88 adapator.
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