First Alert Onelink Battery Operated Photoelectric Smart Carbon Monoxide and Smoke Alarm

HomeKit enabled Wi-Fi smoke and carbon monoxide alarm. Works with the free Onelink Home app to provide alerts on an iPhone or iPad. Detects and alerts the user in the event of a smoke or carbon monoxide emergency. Tells the type and location of the danger, and wirelessly interconnects with other compatible alarms. Designed to last for 10 years. Intended for non-professional, do it yourself installation. Features an easy access battery door for convenience. Includes (1) 3-cell battery pack. Battery life varies according to use and application.