DIR-822 AC1200 Wave 2 MU-MIMO Wi-Fi EasyMesh Router
User Manual
Overview
Also, the power connector is located on the back panel of the router.
The  RESET  button located on the bottom panel of the router is designed to restore the factory 
default settings. To restore the factory defaults, push the button (with the device turned on), hold it 
for 10 seconds, and then release the button.
The device is also equipped with four external non-detachable Wi-Fi antennas.
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