More information here: https://nest.com/ca/smoke-co-alarm/overview/
Nest Protect is a smoke and carbon monoxide detector with some advanced features:
- Tests itself and lasts up to a decade
- Can be hushed from your phone
- Can tell you what's wrong
- Gives you early warnings by voice
- Alerts to phone
- Lights up as you walk underneath it at night to help guide your way
