Yes, there is one, see also the manufacturer's website: https://eu.store.ui.com/eu...

But when you write "to a... router", then I ask myself whether you understand how these access points should actually be used, namely in conjunction with the Unifi Network application / controller, at least at the beginning for the initial configuration.
Just mentioned for the sake of completeness. Connection to the router directly is of course possible, but you have to configure the WLAN SSID etc. somehow. However, you can also use the Unifi app, you don't necessarily have to have the controller software running or even let it run.