Product Review
1.Please cut off the power before installing the device. 2.The router must be 2.4GHz (5.0 GHz WiFi is not supported), but there is no limitation for smart phone network (2G/3G/4G/WiFi network is ok). 3.Use LAN control function to turn on/off the device when WiFi can't access the Internet. Remember to keep WiFi connection among the router, SONOFF device and eWeLink app when using LAN.



![Samsung SmartThings Button [GP-U999SJVLEAA] One-Touch Remote Control for Lights, Appliances, and Scenes - SmartThings Hub Compatible - ZigBee - White](https://m.media-amazon.com/images/I/218tem1QM7L._SL75_.jpg)

