Your alarm triggers but nobody hears it over the workshop noise, the street traffic, or the rain hammering the corrugated iron. The Siren handles that. 110 dB output with integrated emergency LED lighting, so you get both the sound and the visual cue when it matters. All-weather rated, so it lives outside without you worrying about the next storm. Runs on battery or DC input — your call depending on where it's mounted. Part of the UniFi Protect SuperLink family, so it slots straight into your existing camera setup