The TP-Link EAP225-Outdoor is not supplied with a standard mains adapter, but supports Power over Ethernet (PoE) and comes with a PoE adapter for the power supply. This enables flexible installation without an additional mains adapter.

Yes, a PoE injector is included in the scope of delivery. This is used between your router/switch and the access point to supply it with power via the Ethernet cable.

Do I also have to connect a network cable from the router to the PoE adapter? or is it just that it has power and the wifi is received via an antenna?