The MIS-09 was designed for the armored vehicle industry to allow the driver to communicate with a person outside, without opening a window. As well as an intercom, the MIS-09 also includes two sirens. The main siren meets North American Emergency Vehicle standards producing 100 watts or Yelp, Wail, Phaser and Horn sounds. The auxiliary siren produces Yelp at a lower volume for closer proximity use.

The system consists of a main intercom unit and a siren amplifier which are mounted under the dash board, a paging horn adn siren speaker mounted under the hood and a small microphone which is mounted in the outside rear view mirror on the driver?s side. It includes a hand held microphone with push to talk switch which hangs on a clip mounted on the dash. Once installed and connected to the vehicle?s 12 volt electrical system, it is ready to use.