Can the AC1900 extend both 2.4 GHz and 5 GHz WiFi bands?

Yes, if your WiFi router supports the 5 GHz band, you can extend both bands. After connecting the 2.4 GHz band, repeat the WPS button process and verify that the 5 GHz Link Rate LED lights solid green to confirm the 5 GHz connection. Your extender will use the same WiFi network settings as your router for both extended networks.