WiFi Extender Using an Ethernet Cable: How to Choose and Set It Up

Yes, if the extender supports access point mode. Connect the cable from a LAN port on the router to the extender's Ethernet port, then configure the extender as an access point using its instructions.

Some extenders let you connect a wired device through their Ethernet port while they are operating as a range extender. Check the specific model's manual, because port function and supported modes vary.

A wired link avoids using WiFi for the connection between the router and access point, but actual performance depends on the router, extender, cable, internet service and network conditions. A cable does not raise the speed beyond the limits of those components.

Place it where the Ethernet cable can reach and where its WiFi can serve the area you want to cover. Follow the manufacturer's setup guidance and avoid hiding it behind large objects or inside a cabinet.