When powering on, wifi is turned off by default, first turn on the wifi switch(There are two ways to connect to wifi in the manual)Method one:  a) Take out the TF card and connect it to the computer in the shutdown state, the computer prompts that there is a partition that needs to be formatted, click Cancel;  b) Enter the second partition (boot partition) and create a new text file wifikeyfile.txt;  c) Place your network details here (note that only applies to WPA networks)ssid="NETWORK_NAME"psk="NETWORK_PASSWORD"  d) Insert the TF into the TF card slot of the game console and turn it on,f) Select the RETROPIE tab to enter the WIFI option;  e) Select "Import wifi credentials from /boot/wifikeyfile.txt" option to import Wi-Fi password.Method 2: Find Retropie after bootingEnter WIFI option, select Connect to WiFi network (as shown above),Type your Wifi Password (may take a moment to connect)Note: For details,please refer to retropie's official website:https://retropie.org.uk/docs/Wifi/#connecting-to-wifi-without-a-keyboard