One device to monitor the smoke alarms you already have.

Always listening

Cellular

Battery powered

01

Listens

Recognizes a supported T3 smoke‑alarm pattern.

02

Transmits

Sends the alarm event over the cellular network.

03

Built-in cellular

No Wi‑Fi required.

04

Responds

A trained monitoring‑center operator evaluates and responds.

SOLOH works with compatible smoke alarms that produce the UL-standard T3 smoke-alarm pattern, including supported 520 Hz low-frequency alarms. T3 is the repeating three-beep emergency pattern used for smoke and fire alerts. Check compatibility before purchasing and installation.

Yes, if your existing smoke alarms produce a compatible UL-standard T3 smoke-alarm pattern. Compatibility should be confirmed before installation. SOLOH does not replace your existing smoke alarms — it listens for their supported alarm pattern and sends a recognized alarm event to the professional monitoring center.

If your smoke alarms are interconnected, one SOLOH placed within 6 inches (15 cm) of a compatible alarm can cover the interconnected group because all the alarms sound together. If your smoke alarms are standalone and do not all sound together, each alarm requires its own SOLOH placed within 6 inches (15 cm).

Press and hold the test button on one smoke alarm. If every smoke alarm in the home sounds, they are interconnected. If only the alarm being tested sounds, it is standalone. Always follow the smoke-alarm manufacturer's testing instructions.

Install SOLOH indoors, within 6 inches (15 cm) of a compatible smoke alarm. Follow the enclosed instructions for placement, installation and testing.

SOLOH is designed for indoor use in temperatures from 32–113 °F (0–45 °C) and up to 85% humidity, non-condensing. Do not install SOLOH in attics, unconditioned garages, crawl spaces, outdoor locations or other areas outside the approved environmental range.

No. SOLOH communicates through its cellular connection and does not require the customer's Wi‑Fi. Cellular service is included with an active SOLOH monitoring plan.

Yes. An active SOLOH professional monitoring plan and monthly service fee are required. The plan supports cellular communication and professional monitoring.

SOLOH listens for a supported UL-standard T3 smoke-alarm pattern. When it recognizes the pattern, it transmits an alarm event over the cellular network to the professional monitoring center. A trained operator evaluates the signal and responds according to the active service plan.

No. SOLOH is not a smoke alarm and does not detect smoke or fire. It listens for the supported T3 alarm pattern produced by a nearby compatible smoke alarm. Existing smoke alarms must remain properly installed, powered, maintained and tested.

No. SOLOH works alongside compatible smoke alarms. It does not replace them or change their normal operation.

Yes. SOLOH and the existing smoke alarms should be tested according to the installation instructions. Proper placement, battery power, cellular service and an active monitoring plan are required.

SOLOH measures approximately 3 × 3 inches and is less than 1 inch deep — about the footprint of a standard light-switch plate.

SOLOH uses one replaceable CR123 lithium battery. Manufacturer-estimated battery life is up to 3.7 years, although actual battery life varies by device settings, usage and environmental conditions.