This is a Barebones PC with the Intel CPU included, you will need to provide the RAM, SSD and any operating systems you require, Shuttle only make the barebones with the Intel i3 CPU system included in this model

XPC slim DS10U3

Fanless Slim PC with a Whiskey-Lake-U processor in industrial design

The DS10U-series is a fanless slim PC with a robust 1.3-litre metal chassis and exceptional connectivity. It supports two digital video outputs for UHD/4K displays and one traditional D-Sub/VGA connector. The built-in Intel "Whiskey-Lake-U" processor provides ample performance for playback of 2160p/60 videos. Installation of components goes straight forward, as there is plenty of interior space for two memory modules, one 2.5" drive and an M.2-2280 SSD card. Optionally, an LTE module can be fitted in the 2,5" bay using the WWN03 accessory. Thanks to its passive cooling, the system is virtually maintenance-free and is approved for 24/7 nonstop operation. It is big on performance, yet extremely energy-efficient. The Shuttle XPC slim Barebone DS10U series is an ideal platform for professional applications such as digital signage, POS, Kiosk, Thin Client, Office PC and Multimedia.

Footnote:

[1] Jumper for COM port configuration
Pin 9 of the COM-Port is a multi-functional signal. Based on the Jumper JP1 configuration on the mainboard, it can be configured as Ring Indicator (RI) or external power supply with a voltage level of either 5 V or 12 V. Each COM port can be configured separately. The operating mode of COM 1 can be set to RS232, RS422 or RS485 in the BIOS. 
The second COM port (COM 2) supports RS232 mode only, and in the standard SKU of DS10U3 this is only available as an onboard connector on the mainboard. An appropriate adapter (e.g. the optional accessory PCP11) is required in order to provide this port as D-Sub connector at the back panel. In this case the VGA port cannot be used..
[2] LTE Adapter Kit WWN03
Using the LTE adapter kit WWN03 means, that the 2.5" bay can no longer be used for SATA drives in 2.5" format (hard disk or SSD). An SSD card in the M.2-2280 format must be used instead.
[3] Teaming Mode
The teaming function allows you to group both available network adapters together to function as a single adapter. The benefit of this approach is that it enables load balancing and failover.
Driver download: [link removed by eBay]
[4] Four-pin header at the back panel
This header allows for connecting an external power button.
It also provides 5 V DC voltage for external devices and the Clear CMOS function. Optional accessory: the adapter cable CXP01.
[5] Caution: For ambient temperatures higher than 35 °C we strongly recommend to use an SSD instead of an HDD
[6] Power on after power fail:
The BIOS setup provides a "Power-On after Power Fail" function that can be found under "Power Management Configuration". This function determines the PC's behaviour after power failure. As a matter of the nature of this function, it may fail after short power failures. This is why the Shuttle XPC slim Barebone DS10U3 also comes with a hardware-based solution. By removing Jumper J9 (please refer to the quick user guide), the system will start unconditionally once power is applied.
[7] HDMI output supports DVI-D with an optional adapter
[8] How to convert DisplayPort into HDMI/DVI
The DisplayPort output can be converted to HDMI or DVI by an additional, passive adapter cable. For example:
DELOCK 82590: 1 m, DisplayPort (male, 20p) to HDMI-A (male, 19p)
DELOCK 82435: 5 m, DisplayPort (male, 20p) to DVI-D (male, 24p)
The integrated graphics automatically detects the connected display and puts out the appropriate electric signal - either through DisplayPort (without an adapter) or HDMI/DVI (with an adapter).
However, a monitor with a DisplayPort connector cannot be connected to the HDMI port with a simple, passive adapter.