This is an older Apple TV model. Itdoes not support modern AirPlay Mirroring (e.g., iPhone X screen mirroring).
Apple TV A1378 2nd Generation HDMI 720p 10/100BASE-T Ethernet W-Fi 802.11a/b/g/n
Apple TV A1378 2nd Generation Media Streamer Black With Remote And Box
Apple TV A1378 Box - Black - Remote Included - No Power Cable
Apple TV A1378 Sealed
Apple TV A1378 Gen2
APPLE TV 4K 2ND GEN 32GB A2169 HDR DOLBY VISION STREAMING BOX A2169 MXGY2B/A