1. Tuya Zigbee Hub Wireless Gateway Is A Must-have For Sos Sensors And Various Zigbee Smart Products. It Has Been Proven To Be The Bridge And Control Center Of Smart Homes. It Plays An Irreplaceable Role For All Zigbee Products And Realizes The Connection Of All Smart Homes. After Adding The Hub To Smart Life / Tuya App, Just Add The Sensor To The Zigbee Hub. 2. One-click Alarm For Help. The Smart Life Tuya App Is Compatible With Smartphone Push Notifications And Can Receive Alarm Information From Smartphone Sensors Anytime And Anywhere. 3. Mini Design, Wide Range Of Applications, Suitable For The Elderly And Children, Especially For Sending First Aid With Just One Click. There Are No Complicated Actions Or Buttons. 4. Diy Compatible Control: Supports Diy Sensors To Intelligently Connect With Other Smart Devices To Detect On/off, Motion, Water, Fire And Other Smart Scenes. 5. Mit Frequency 100dbm, Battery Powered; Wear It Anywhere With A Rope; Use It With A Zigbee Gateway Hub To Define The Wor