That would be an awesome 👏 additional feature to the P25RX, especially for “us” Emergency Responders. The functionality is that in addition to the normal “Monitor Mode”, the receiver can also be set to “Alert Mode”, monitoring a specific TGID (Dispatch) whereby it remains muted until the correct tone sequence is received, then unmutes to allow the subsequent audio message to be heard. Typically, an internally generated Alert Sound (.wav or .mp3) precedes the voice message, and is user selectable/programmable.