To back up Dell-Brian B's threads you can find all the available Dell documents for the Dell Dock and Dell Thunderbolt Dock here.
This article provides the information on "The Dell Dock (WD15) and the Dell Thunderbolt Dock (TB15)".
A common issue with any USB device is to have the most current drivers and updates installed. If you are installing these products, you might want to start with the Driver Troubleshooting section of this document.
This dock uses DisplayPort over USB Type-C cable technology to transmit audio, video, data and power up to 130 watts to and from your system over a single cable connection.
DisplayPort over USB Type-C Icon:
Monitor support for dual Full High Definition (FHD/1920 x 1080 resolution) displays or a single Ultra High Definition (UHD/3840 x 2160 resolution) 4k x 2k display @ 30 Hz refresh rate.
Dell Dock WD15 User Guide
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Based on Thunderbolt 3 technology.
This dock uses Thunderbolt 3 cable technology to transmit audio, video, data and power up to 130 watts to and from your system over a single cable connection.
Display support for a single 5k x 3k (5120×2880) or dual - 4k x 2k (3840 × 2160) Ultra High Definition (UHD) display capability (Multi-Stream Transport (MST) not supported)
Dell Thunderbolt Dock TB15 Users Guide
These USB Type-C cables are used with these docks.
When connected to a NON-Dell system the following limitations will apply:
Here are some common symptoms and solutions related to your Dell Thunderbolt Dock.
To fully support new generation Dell Dock and Dell Thunderbolt Dock. Dell highly recommend installing the following BIOS/Drivers step by step on the 64 Bit Windows Operating System.
To access the User Guide or Quick Setup Guide for your Dell Dock WD15, please follow the instructions below:
Article ID: SLN301075