... people around Background noise cancel With replaceable tube throat microphone for Icom wireless radio IC-F3 IC-F3S IC-F4 IC-F4S --Two sensors design ... are valid Compatible with :For Icom:IC-F3,IC-F3S,IC-F4,IC-F4S,IC-F10,IC-F20, IC-H2IC-H6,IC-J12, IC-M5, IC-U12,IC-U16,IC-36FI For Maxon ...