Decot Red Arrow Model 30 Siren | Noon Blast | Norwalk, WI | 6/3/24

[@SIRENS_AND_EAS]

Is there a second siren in the background or is that the siren making it?

[@SirensOfWisconsin1679]

This is dual tone, the purpose of dual tone is to make the siren sound like 2 different sirens. But there is the only siren that is sounding