Aico 180 Heat Alarm runs on a 12V to 24V variable DC power and has a 9V Alkaline battery back-up. The alarm gives a fire warning when adequate heat enters the alarm. The alarm is supplied with an Easi-fit base that allows quick and simple installation of the smoke alarm head. The Easi-fit base automatically connects both the mains power and battery as the alarm slides on. The alarm has other advanced features such as built-in circuitry to aid suppression of voltage transients and RF interference to further reduce the chances of false alarms under such conditions.