Ubiquiti UniFi Siren - USL-Siren

Ubiquiti UniFi Siren - USL-Siren

At a glance:

• 110 dB siren buzzer
• RGB light ring
• Weatherproof IP56-rated
• Wall and ceiling mountable
• Battery or DC input
• SuperLink connectivity up to 2 km

The Ubiquiti USL-Siren is a rugged and highly effective wireless alarm siren designed to bring a new level of audible and visual alerting to your UniFi security ecosystem. Built to withstand the elements with an IP56 weather-resistant rating, this device combines durability with performance, making it suitable for both indoor and outdoor installations where dependable alarm signalling is essential.

At its core, the USL-Siren harnesses Ubiquiti’s proprietary SuperLink wireless technology to communicate reliably with a SuperLink gateway or compatible UniFi Protect controller. This allows the siren to be positioned flexibly across large properties without needing complex wiring, while still maintaining a robust connection to your broader surveillance and alert network.

When triggered, the siren emits a powerful 110 dB alarm that can deter intruders or signal emergencies with clarity and urgency. Alongside the sound output, it features a multicoloured LED light ring (capable of displaying vibrant R/G/B/W signals) that provides a visual cue during alert events — an especially useful addition for alerting occupants or responders in noisy environments or alerting from a distance.

Installation of the USL-Siren is straightforward, with the included mounting bracket allowing it to be secured to walls or ceilings as needed, while its compact 140 × 140 × 35 mm form factor keeps it discreet but noticeable when active. The siren can operate on four CR123A batteries or via a 12–24 V DC input, giving you flexibility in how you power it depending on your setup.

Compatibility with the UniFi Protect platform means you can manage alerts, monitor status, and integrate the siren’s alerts into broader automation workflows through both web and mobile apps, creating a cohesive security experience that goes beyond simple motion detection or camera surveillance. Its certifications, including FCC, IC, CE and NDAA compliance, reflect a commitment to quality and reliability that fits well in both home and professional environments.

If you’re looking to add a versatile and high-impact alerting component to your smart security setup, the USL-Siren delivers sound, visibility and connectivity in a package that’s both resilient and intuitive to deploy.