Smart :If you're looking for an easy-to-use and reliable way to protect your home from fire, a smart smoke detector is a must-have. Smoke Fire Alarm:Not only a smoke detector, it is also an . Once it detects any smoke in dangerous level, you will be at first time. Smart Phone Remote Monitoring to Make Your Home Smarter:No matter how far away from home, the warning of home is in hands. High-decibel Alarm Sound:When it detects dangerous level of smoke concentration that may trigger fire, it will alerts you with a red indicator light and a loud, audible alarm. Protect Your House From Fire Threat:Install it in a place where fire are likely to occur for detection and alarm, to prevent any danger from fire spreading effectively. Colour:White Material:Plastic Due to different product batches, the appearance , which does not affect the use Package Contents: 1x ZigBee Smart Wireless Smoke Detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.