Before turning on a loud, howling alarm, Nest Protect gives you an early warning we call Heads-Up. Nest Protect lights up yellow and speaks with a human voice. It tells you where smoke is or when carbon monoxide levels are rising. This gives you an earlier warning if there’s an emergency, or allows you to silence Nest Protect if it’s just a nuisance alarm, like an overly enthusiastic toaster.
If you thought revolutionising the thermostat was enough for Nest, think again.