Code3 Mastercom 3892L6 siren being tested with Wail, Yelp, HiLo, HyperLo, HyperYelp (Piercer), Airhorn, Manual with no speaker hooked up. Also I did not hook up anything else than +12v and GND so that the lights of the slide switch or buttons don't lit up.
The Mastercom series is one of my favourite sirens.
