1, Original Power adaptor + WiFi
If the power outlet is near the camera installation place(less than 5ft), just connect camera to original power adaptor, and transfer data via WiFi, but the installation place must be WiFi covered. We suggest you setup camera wifi first in Wired Way(Power+Ethernet cable) near the router, then you can remove the Ethernet cable and move it to installation location, just connect power, it will reconnect WiFi aromatically.
2, Original Power adaptor+Power Extender+WiFi
If the power outlet is too far from the camera (more than 5ft), but you do not want to install another power jack, you may use the Power Extender plus Ethernet cable as photo (Just use the power connector, Do NOT use the RJ45 connector or cut it off), the Ethernet cable could be up to 60ft, then the camera could still connect router via WiFi (setup wifi first near router).