First Alert Onelink Smart Smoke and Carbon Monoxide Detector, 2-pack

Features:

Emergency Alerts Sent to your Phone
Interconnects with other Onelink Devices, When One Sounds, They All Sound
Compatible with iOS and Android, works with Alexa and Apple Homekit
Hardwired Version Includes Universal Adaptors for Quick and Easy Installations with Existing First Alert®, BRK®, Kidde®, and Firex® Alarms
Voice Alarm Tells Where Potential Danger Exists