FEATURES
PIN 1 . PIN 2 : Siren Speaker
PIN 3 . PIN 4，PIN 6 : NULL
PIN5 : WALL/YELP tones shift , shortly connect with Negative signal
          WALL/YELP shift , connect with Negative signal for ,seconds,
           ribgs the AIR HORN
PIN 7 : NIGHT MODE , connect with negative signal The sound reduce to 25%
PIN 8 : power switch /+ 12v
PIN 9 , PIN 10 : Siren power (positive)
PIN 11, PIN 12 : Siren power (negative)

SPECIFICATIONS
● 12V / 24V optional
● 100W output capacity
● Standard Siren Tones(3): Wail/Yelp/Air Horn.
● Night mode.
● Volume Control Thumbwheel on Micphone
● PA with Built-in Noise Cancelling Mic
● Durable design for heavy vehicle,
● 5 year warranty