This is a device that will connect to your wireless network and then convert that wireless signal into a wired output. So your wired devices can plug into this. This will be responsible for connecting to the wifi network at high speed.

For e.g. you can connect Apple TV, Xbox, PS4, IP cameras etc to this device via ethernet cable and they will be able to connect to the wifi network. Also if the device already has wifi capability, this will be better as it is a dedicated wifi switch to connect to the wifi instead of using a device's wifi.

https://www.amazon.com/Linksys-Wireless-AC-Universal-Connector-WUMC710/dp/B0090DX8O8

Sells for $147 currently on amazon

$50 each or best offer. I have 3 of these, brand new. Unopened and sealed boxed

Easily connect up to four Ethernet-enabled entertainment devices to your existing wireless network and enjoy HD-quality video streaming.
Ideal for:
• The fastest HD video and media streaming
• Instant wireless connectivity
• Streaming HD video and music
• Online gaming head-to-head
• Connecting multiple home theater or office devices
Next generation Wi-Fi with speeds approximately 3x faster than Wireless-N

Thanks!