Brand new - in box - never opened I have multiple. BELOW RETAIL PRICE Nest Labs Nest Protect Wired Smoke / CO Alarm: • Tells you what and where: Nest Protect speaks up to tell you if there's smoke or CO and tells you where the problem is so you know what to do • Know from anywhere: Connect the Nest Protect to Wi-Fi and it'll send a message to your phone if the alarm goes off • Nest Protect sees the CO you can't: Carbon monoxide is odorless, invisible and deadly. When there's CO, Nest Protect tells you where it's hiding • Nightly Promise: Nest Protect tests its sensors and batteries constantly and lets you know they're working with a quick green glow at night, and a motion-activated light • Silence the chirp: Low-battery chirps ever rattle your dreams? Nest Protect shows you its batteries are good before you doze off