The First Alert Onelink 2-in-1 smart smoke and carbon monoxide alarm alerts you to both types of danger in your home. Emergency notifications alert you to danger via your phone, while voice and location technology tell you the type and area of danger; the alarm also uses a traditional 85-decibel siren. Onelink interconnects with other existing traditional hardwired alarms and other Onelink devices (sold separately) to create a smart home safety network, so if one alarm sounds, they all sound. This alarm is also compatible with Amazon Alexa; you can ask Alexa to check the status of your Onelink alarm. The Onelink Home App is compatible with both Android and iOS devices. This easy-install hardwired alarm includes an adapter plug so you don’t need to rewire, and a 10-year sealed battery backup for protection in power outages. The alarm is designed to last for 10 years, and will alert you when it needs to be replaced.

First Alert Onelink Smoke Detector and Carbon Monoxide Detector Hardwired First Alert SMOKE + CO DETECTION 2-in-1 smart smoke and carbon monoxide alarm alerts you to both types of danger in your home, with a photoelectric smoke sensor and electrochemical carbon monoxide sensor MOBILE + VOICE ALERTS Alarm sends emergency notifications, via your phone, while voice alerts tell you the type and location of danger A HOME SAFETY NETWORK + ALEXA Interconnects with existing traditional hardwired alarms and other Onelink devices (sold separately) to create a smart home safety network, so if one alarm sounds, they all sound; works with Amazon Alexa so you can ask Alexa to check the status of your Onelink alarm (Alexa device sold separately). HARDWIRED + BATTERY BACKUP Hardwired alarm includes a 10-year sealed battery backup for protection in power outages; for maximum protection, hardwired alarms should be installed on every level of the home and inside each sleeping area COMPATIBILITY Compatible with Apple HomeKit; can be used on both Apple and Android devices INTERCONNECTIVITY: Unlike other smart combo alarms, Onelink can connect with any other hardwired alarms in your home (including First Alert and non-First Alert brands), and can send a mobile notification for any detected emergency, keeping your whole home safe and connected