New in box opened box never used Nest Protect (battery) has been completely redesigned. It has an industrial-grade smoke sensor, can be silenced from your phone, tests itself automatically, and lasts for up to 10 years. It also tells you what's wrong and can even alert your phone. Alarm updates wherever you are Nest Protect alerts your phone when something’s wrong when you are not home. In the unfortunate instance when something isn’t quite right, the Nest Protect speaks up to tell you if there is smoke or carbon monoxide, and where the danger is. It is also the first alarm you can silence from your phone. Simply download the Nest app to your Smartphone to gain full control of the situation.
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