M-7 MICROPHONE RETROFIT KIT 18376G-02M-7 MICROPHONE RETROFIT KITThis Retrofit Kit allows you toupgrade your older model headset (H10-40, H10-30 etc..) microphones withour M-7/DC Amplified Electret Microphone which is the latest inmicrophone technology. Easy to install because you do not have to changethe Boom Assembly.
