Siren Sound Integrated Circuits - HK625

 4 sirens ( ki ki ki ...alarm , police 
   car, fire engine, ambulance siren )
   available . 
 Built in 1 LED flash output for
   sound out indication . 
 4 alone sound output from 4 alone
   trigger pins touched .       
 Option trigger mode by one shot re-
   trigger type or level hold type .