It was manufactured by Ac-Bel, with the ADA090C19C code name and can deliver on the output 19V at 4.74A, for a maximum of 90W:

The adapter cable ends up with a jack plug:

The VESA adapter does come with two separate components, but it is the same design we have seen before with other Shuttle barebones:

For some reason, Shuttle is still including installation disks; it is a problem nowadays when we do not use disk drives so often anymore, an USB drive would have been more useful in this case:

The DS50U series comes with an optimized, redesigned chassis which looks even better than before! The side with the large heatsink is now perforated for allowing a better air circulation inside the unit, when the computer is arranged in a vertical position (this barebone was designed to function exclusively in a vertical position):

In the front, we have two USB 3.2 Gen 2 ports in red color, no less than four USB 3.2 Gen 1 ports in blue color, a Power LED, a Storage activity LED, a central Power button, a microphone jack port, but also a headphone jack port:

On the left side, we do have two perforations for the optional 4G/5G antennas:

Two more perforations are available on the right, along with a Kensington lock port; of course, both sides do have perforations for air to flow through:

In the back, Shuttle does surprise us with plenty of interfaces! We have the 4-pin connector for the external Power button, Clear CMOS and 5V DC voltage, two antennas for the Wi-Fi connection, a DisplayPort 1.4, a HDMI 2.0b port, a COM port with support for RS232/RS422 and RS485 standards, 2 USB 2.0 ports in black color, a RJ45 1Gbps LAN port, backed by an Intel i219 controller, a 2.5Gbps LAN port, backed by an Intel i226 controller, a DC-IN port for the power adapter but also a D-Sub/VGA port for older displays: