Yeah 9219s were the most common alarm in my Elementary School, aside from the newer renovated areas with TrueAlerts. There is only one 4901-9822 in my high school, apart from all the 9846s. Both of these were on 9105 strobe plates.
Yeah 9219s were the most common alarm in my Elementary School, aside from the newer renovated areas with TrueAlerts. There is only one 4901-9822 in my high school, apart from all the 9846s. Both of these were on 9105 strobe plates.