This is noise-activated, so I could put a microphone next to a real fire alarm, and when it senses the noise, the voice evacuation would start. After it begins, it has latched on and needs the reset button to be pressed. Also, be sure that if you want the voice to work, Voice Toggle is set to 1.
NOTE: Requires good microphone and big noise source to operate. ALSO: A big thank you to firealarmcollector.com for the SFX and also Fire-Lite for some of the voice messages.