Bought to use with a Fire TV Stick 4K and all it took was physically (or in between) plugging it in and the Fire TV Stick 4K started using it instead of to use WiFi (after downloading due to 5V power failure). When RJ45 is disconnected, it will automatically return to WiFi. Haven't noticed any problems yet. I haven't measured the Ethernet throughput and haven't tried the USB hub yet.
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