Thinks, speaks, and alerts your phone. Theres never been a smoke and CO alarm quite like this. Nest Protect looks for fast-burning fires, smoldering fires, and carbon monoxide. It speaks up when theres a problem and can send a message to your phone if youre not at home. And it helps keep you safe and sound for up to a decade. Smoke detector and carbon monoxide detector that speaks up in a friendly voice to give you an early warning when there's smoke or CO in your home Split Spectrum Sensor looks for both fast burning and smoldering, and tells you where the danger is Get phone alerts so you know something's wrong even when you're away from home CO detector looks out for carbon monoxide and tells you where it's located With App Silence you can silence the smoke alarm with your phone in the Nest app when there's only a little smoke No chirps to tell you the battery is low; Nest Protect tests its own batteries and gives you a Nightly Promise when you turn off the lights so you know everything is working A Light in the Dark: Usually Nest Protect has its light turned off but when you walk underneath it Pathlight can light your way. The Nest smoke and carbon monoxide alarm has sensors with a 10-year lifespan to help keep your family safe for up to a decade With Safety Check you can test all your smoke and CO alarms with just a tap and get a full report once the test is done Know from anywhere. Connect Nest Protect to Wi-Fi and it will send an alert to your phone if the alarm goes off or the batteries run low. Tells you what and where. It speaks up to tell you if theres smoke or CO and where the problem is, so you know what to do. Connectivity: Bluetooth 4.0 LE, Wi-Fi 4 (802.11n) App Silence. Nest Protect is the first alarm you can hush from your phone. Simply walk to the Nest Protect that noticed the problem and open the Nest app. Split-Spectrum Sensor. In an emergency, seconds count. Nest Protect uses two wavelengths of light to look for both fast and slow burning fires. Heads-Up. Get a friendly voice alert so you can handle burning toast before it becomes a burning toaster. 10-year carbon monoxide sensor. Carbon monoxide is odorless, invisible and deadly. When theres CO, Nest Protect tells you where its hiding. S3000BWES