Used to start the WPS negotiation process, or to reset the router. 
-  WPS: Through the WPS negotiation, you can connect to the WiFi network of the 
router without entering the password. 
Method: Press the button, and the LED indicator blinks green fast. Within 2 
minutes, enable the WPS function of the other WPS-supported device to 
establish a WPS connection. 
-  Reset: When the router is working normally, hold the button down for about 8 
seconds, and then release it when the LED indicator blinks orange fast. The 
router is reset.