It has two kinds of alerts.
Nest smoke detector wired.
When the nest protect smoke and carbon monoxide co alarm has something to say it will speak to you in words and colors instead of just beeping.
Re designed from the inside out it has an industrial grade smoke sensor can be silenced from your phone tests itself automatically and lasts for up to 10 years.
Google nest protects speak to each other wirelessly.
Heads up and emergency alarms.
With wireless interconnect you can add more alarms without adding expensive wiring and it allows nest protect to convey more safety information in an emergency.
Some smoke and carbon monoxide co alarms communicate with each other through wires.
Wireless interconnect has advantages over wired interconnect.
Nest protect can see smoke or carbon monoxide levels rising.
Effortlessly hush the alarm on the nest app if you burned the toast.
So before it turns on an emergency.