Nest Protect

• Nest protect is a smart device which detects indoor smoke.
• Configure it with mobile app and get notification when nest protect detects smoke.
• It also alarms on detecting smoke.
• it has 2 variants - Battery powered and Wired.
• Battery variants warns you when battery change is required.
  It can differentiate between smoke and steam.

https://m.youtube.com/watch?v=WioKsB6miyQ