Hi there!
Hello, hg8245h only supports a 2.4GHz WiFi network, it does not support the 5GHz WiFi network. The configuration method is as follows:
Please log in to the web page of the device, Click the WLAN tab, and choose 2.4G Basic Network Settings from the navigation tree on the left. In the right pane, configure the basic parameters of the 2.4G Wi-Fi network. Then click Apply.

For more information about Wi-Fi configurations, click:
【Wi-Fi Special】05 wifi settings in One Figure
Thanks!