First Alert Onelink Smoke & CO Detector

The First Alert Onelink Smoke & CO Detector is a WiFi-connected combination alarm with Apple HomeKit support, providing smartphone alerts when smoke or carbon monoxide is detected even when you're away from home. This hardwired detector features both photoelectric smoke sensing and electrochemical CO detection with voice alerts specifying the hazard type.

HomeKit integration sends notifications to your iPhone when alarms trigger, enabling rapid response whether you're home or away. The detector wirelessly interconnects with other Onelink alarms—when one detects danger, all alarms sound throughout the house. Battery backup ensures operation during power outages.

The 85dB alarm with voice alerts clearly announces whether smoke or CO is detected. The Onelink app provides remote testing, battery monitoring, and alarm history. Night light functionality provides gentle illumination with brightness control through HomeKit. For Apple households wanting connected smoke/CO detection with remote alerting, the Onelink provides reliable safety monitoring with HomeKit integration.