This is a stand for the Vive's controllers.It can be used as a simple stand or as a charging station.
There are several add ins available that allow different Micro USB cables to be mounted in the stand to convert it into a charging station. If no file exists with the correct dimensions (mentioned in the file name in mm) for your USB cable, you can simply modify the included generic add in to your needs. If you want to use the micro-USB cable that comes bundled with the Vive, print the "BaseUSB_Vive" add in.
There is an awesome remix available, that allows you to magnetically attach the stand to any ferromagnetic surface: http://www.thingiverse.com/thing:1478739
This model has some bridges and overhangs. You might need to enable support.
Mount USB cable
To use the stand as a charging station print the add in fitting your USB cable and glue the cable into it making sure that the plug fully slips into the controller. You also may want to remove the metal clips to make insertion and removal easier.