First Alert Onelink

🧠 Smoke + CO Detection

• Detects both smoke and carbon monoxide with separate internal sensors.
• Delivers audible alarms and visual indicators to tell you which danger is present.

📱 Smart Alerts & App Connectivity

• Connects to Wi‑Fi and the Onelink Home app to send alerts to your phone when smoke or CO is detected.
• Some older Onelink models support HomeKit, meaning they show up in Apple’s Home app and can be part of automations.

🔊 Interconnect Function

• Onelink detectors can interconnect with one another wirelessly so that if one alarm sounds, all the alarms respond — increasing whole‑home safety. (Up to 18 units can be linked.)

💡 Extras

• Some versions include built‑in night light control or voice alerts.
• Easy battery replacement and wireless installation options.