Specs:
SOC: Amlogic S905X2
RAM: 4GB SpecTek DDR4L (PS082-062 BT)
EMMC: 32GB Samsung (KLMBG2JENB-B041)
WiFi: AP6255 433Mbps
Ethernet: 100Mbps what is integrated into the SOC (I think it is the same in the 4/64GB version also)
The Ethernet port is advertised as "1000M" ( 1000Mbps / 1Gbps ) but in fact it is 100Mbps.
Technically it is working correctly, I tested and reached 60/95Mbps (Down / Up) on Speedtest.net and on Fast.com (Yes, the Down speed was slower for some reason with the android apps)
I also tested the LAN speed and reached 95/95Mbps (Down / Up) speed on FTP
They might give you the excuse that they meant the WiFi is 1000Mbps, but it is 433 Mbps. Here are my test results:
230/230Mbps (Down / Up) on Speedtest.net and on Fast.com
I also tested the LAN speed, but because of the limitations of my "FTP server" I reached 95/95Mbps (Down / Up) speed on FTP
I tried a TP-Link UE300 USB 1000Mbps network card, it was recognized and it was working "plug and play"
70/210Mbps (Down / Up) on Speedtest.net
160/220Mbps (Down / Up) on Fast.com