Acoustic indicators Acoustic indicator 230Vac G100 - Giovenzana G100.230 €45.30 (€37.44 tax excl.) Acoustic indicator, recessed signaling horn. This indicator provides an acoustic signal with a sound frequency of 300-350Hz. Operating voltage 230Vac.Reference: G100.230 Representative image for illustrative purposes, the item supplied will correspond to the specifications indicated. View