Auer Signal PC7TD Top Transducer Module 7 of 112 tones can be switched externally, 24 V AC/DC: Black

https://www.auersignal.com/en/tower-lights/modules/modul-perfect-70/a

• Electronic sounder module with transducer technology for Modul Perfect 70 modular signal tower
• For mounting at the top of a signal tower
• 16 tone groups, each comprising 7 signal tones = total of 112 tones
• 16 tone groups can be selected via DIP switch
• Binary, external switching of all 7 tones in a tone group via 3 inputs
• The wide variety of tones meet virtually all acoustic signalling requirements
• Max. 105 dB volume, can be controlled with potentiometer
• High degree of protection IP66/IP67, UL type 4/4X/13
• pc7td-top-multi-tone-siren-module/