you will need a hobby motor and one rotor and stator of matching port #

(the thunderbolt stator is universal and can be used with any rotor)

you attach the motor body to the siren stator and the motor shaft to the siren rotor

there is an optional shroud and intake as well as an intake with a coded option (the coded option will need you to make something to actuate the damper [I use a servo motor] )


the sirens are designed to print on both FDM and SLA printers
they are more efficient when printed with resin but still work very well when printed with PLA