To enable this feature to in to the configuration menu.
Tap the (+) Button or the (-) Button until you hear the voice prompt, “VOX intercom”. If this feature is enabled, you can initiate an intercom conversation with the last connected intercom friend by speaking any word loudly enough. If you start an intercom conversation by VOX, the intercom terminates automatically when you and your intercom friend remain silent for 20 seconds. However, even when this feature is enabled, if you want to terminate intercom conversation manually, press and hold the (-) Button for 3 seconds. Then you are not able to start intercom by voice temporarily. In this case, you have to tap the Center Button to restart the intercom. This is to prevent repeated unintentional intercom connections by strong wind noise. If you tap the Center Button to start an intercom conversation, it is not terminated by 20
seconds of silence. After turning the SMH10R off and on, you can start intercom by voice again.