The Nest smoke and carbon monoxide alarm is shown at the company’s offices on Tuesday, Oct. 1, 2013, in Palo Alto, Calif. Tony Fadell, a gadget guru
The Nest smoke and carbon monoxide alarm is shown at the company's offices on Tuesday, Oct. 1, 2013, in Palo Alto, Calif. Tony Fadell, a gadget guru who helped design the iPod and original iPhone while working at Apple, is counting on his latest innovation to prove that a smoke detector can be sleek, smart and appreciated. (AP Photo/Marcio Jose Sanchez) ( Marcio Jose Sanchez )