Siren Sound Integrated Circuits - HK629

 3 sirens ( fire engine, ambulance
   siren , police car ) and a machine 
   gun sound effect for 4 sounds
   available .
 Built in 2 LEDs sequence flash cir-
   cuit for sound indication . 
 4 alone sound output from 4 alone
   trigger pins touched .   
 Trigger mode by one shot re-trigger
   type .
 SQ pin available, all sounds can
   be sequence output when SQ  pin
   is sequence touched .