shelly plus smokeThe Shelly Plus Smoke is a wireless, battery powered smoke detector that continuously monitors your home for smoke. If a risk is detected, the smoke detector sounds an alarm and sends a notification via the app. Long battery life High sensitivity and Wi Fi technology Can turn RGBW lights, strips or alarms red and point the way to the nearest exit Can unlock doors for quick evacuation Can activate other Shelly devices to cut off power in case of fire