SB 112F is designed to signal acoustic fire signals in fire alarm systems. The siren is compatible with fire alarm panels, which provide a 24 V output in alarm mode. SB 112F is a shielded high frequency siren. The case is made of 1mm thick polymer-coated sheet steel. The siren is completed with a 24V / 5W lamp, which flashes with a frequency of 1.5 Hz in alarm mode. SB 112F works well over a wide range of supply voltage.