The wifi gizmo does a few things more.

- alerts you when away

- lights up when you walk under it (great for hallways)

- interfaces with the furnace to turn it off automatically in CO levels are above normal

- interfaces with the Nest controls to determine if you are present or not. Turns down temperature if you are away saving you money.

- alerts occur on all devices letting you know where the issue was detected so you can plan your exit accordingly.

Sorry but we're not talking the same thing here.