I have found that my KG-805G HT transmits a DTMF sequence when once activates the "Alarm/PF2" button and the siren sounds. I had inadvertently bumped the button, the siren sounded and my scanner picked up the transmission the channel I had selected At the time. I downloaded a installed a DTMF app on my cell phone in an attempt to determine what the DTMF message being sent was. All it came up with was a "101010" pattern. So, be forewarned that a distress message in DTMF IS being transmitted on the current frequency when the alarm is activated.