Combi detector Interconnectable Wireless connection 85 dB Maximum range: 15 m Housing material: Plastic Built-in speaker(s) Horn Alarm mute Insect grille Battery Lithium Wireless Wi-Fi Bluetooth White Nest ProtectThe smoke alarm that thinks, speaks and alerts your phone.The alarm goes off and your mind starts to race.Wheres the problem?Is it smoke? CO?Burnt toast?Its time to expect more from your smoke alarm.Nest Protect has been redesigned from the inside out. It has a SplitSpectrum Sensor, tests itself automatically and lasts for up to a decade. It's also the first home alarm that you can silence from your phone without any extra hardware required. And it tells you what's wrong and can even alert your phone.Meet the Nest Protect. The smoke alarm that other alarms look up to.Thinks before it speaks.Nest Protect has a friendly human voice that gives you an early warning. That way you can handle burning toast before it becomes a burning toaster.Tells you where the danger is.And when