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.