Nest Protect Battery Smoke and Carbon Monoxide Detector, S3004PWBUS

This Protect Battery Smoke and Carbon Monoxide Detector from Nest is the ultimate smoke alarm for your home. Redesigned from the inside out, it has an industrial-grade smoke sensor, can be hushed from your phone, tests itself automatically and lasts for up to 10-years. It also tells you what is wrong so you know what to do and where to go and can even conveniently alert your phone in the event of an unforeseen event. Its super-efficient sensor detects both fast and slow burning fires.