This is a unique secondary audio accessory that works with the APX Display RSMs (HMN4101, HMN4103 and HMN4104) and uses bone conduction to allow users to receive audio without covering the ears. This is the first secondary audio accessory to offer both receive and transmit capabilities. The microphone is embedded in the temple transducer, which eliminates the need for the boom microphone and is beneficial for users wearing masks and any face apparatus/gear. Users can operate in loud environments, wear hearing protection and still communicate effectively on their radio.
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