Onelink Smoke + CO Alarm
Birdi Smart Detector
Pop a Roost Smart Battery into a 9-volt smoke and/or CO detector and it will send a smartphone alert when the alarm goes off. If it turns out to be a false alarm, you can use your phone to shut it off. The battery lasts up to five years and sends a message when it’s about to die—no more chirping in the middle of the night.