From the full specs PDF: https://ftp.panasonic.com/connect/mobility/TOUGHBOOK%2040%20Spec%20Sheet%206-24.pdf https://ftp.panasonic.com/connect/mobility/TOUGHBOO

From the full specs PDF: https://ftp.panasonic.com/connect/mobility/TOUGHBOOK%2040%20Spec%20Sheet%206-24.pdf https://ftp.panasonic.com/connect/mobility/TOUGHBOOK%2040%20... I see: Optional Serial (True) D-sub 9-pin 6 Where "6* says: > VGA+Serial+LAN or USB-A+HDMI+Serial or USB-A(x2)+HDMI or Fischer LAN or USB-C+USB-A+HDMI in Rear Expansion Area are mutually exclusive. Wow, I had to lookup Fischer LAN. Never heard of that before. It looks like a IP68-rated Ethernet connection! Ref: https://fischerconnectors.com/en/news-blog/high-speed-data-minimax-with-ethernet-and-20m-24h-ip68/ https://fischerconnectors.com/en/news-blog/high-speed-data-m...