Without any extra actions needed, one Smoke Detector will trigger the other Aqara Smoke Detectors to sound an alarm, and you will hear it no matter how big your house may be. 

Thanks to the energy-saving technologies and powerful lithium battery, the device can reach a record ten-year battery life. You will not need to worry about changing the battery for a long time which will give you peace of mind.

The device has a built-in powerful siren and a colorful LED that will blink and allow you to hear it even if you are in another room, sleeping or listening to loud music.