Features: 1.Self Check Of Key On A Regular Basis, Press The Self-Test Button To Conduct Regular Self-Test To The Normal Operation Of The Alarm. 2.Sensitive Smoke Detection, The Detector Is Mainly Composed Of A Group Of Infrared Transmitting Tubes And Receiving Tubes. When Smoke And Fire Hazards Are Detected, An Audible Alarm As High As 95db Will Be Issued, And The Led Light Will Flash Red, And It Will Be Pushed To The Mobile App To Protect The Whole Family. 3.Remote Alarm, Mobile App Remote Monitoring, Once The Smoke Concentration Is Too High, The Will Immediately Give An Alarm, And Linkage Gateway And Mobile App Will Give An Alarm At The Same Time 4.Sensitive Smoke Detection, The Detector Is Mainly Composed Of A Group Of Infrared Transmitting Tubes And Receiving Tubes. When Smoke And Fire Hazards Are Detected, An Audible Alarm As High As 95db Will Be Issued, And The Led Light Will Flash Red, And It Will Be Pushed To The Mobile App To Protect The Whole Family. 5.Low Power Reminder, At The Same Time, When The Detector Is In The Alarm State, The Remote Mute Function Can Be Realized Through The App. Description: 1. Detection Angle: 180 2. Detection Distance: 3 meters 3. Type: 4. Communication : Wireless 5. Quiescent Current: 10uA 6. Working Voltage: 3V 7. Alarm Current: 160mA 8. Working Temperature: -10-50 9. Scope Of Application: Home, Office, Factory Warehouse 10. Installation : Ceiling Type Color: white gray Material: ABS Package Contents: 1 x Zigbee 1 Set Of Screw Accessories Note: Requires Connection To The Graffiti Zigbee Gateway For The Product To Work 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.