Powerline network adapters transmit the signal from your router/modem to your computer over the home's electrical system. Ideally both powerline adapters are installed on the same circuit, at least on the same breaker panel. In an apartment you don't really have much control over that probably. If you buy from someone like Amazon, if they don't work in your situation, you will be able to return them. In most cases powerline adapters will give you a better signal than WIFI, but less than direct ethernet connection to the router.