Using the dongle
If you’re using two controllers along with VIVE Tracker (2018), you need to connect the dongle to enable hardware tracking.
Connect one end of the supplied USB cable to the dongle cradle, and then attach the dongle to the cradle. Connect the other end of the USB cable to your computer.
Note: Keep the dongle at least 45 cm (18 in) away from the computer and place it where it won’t be moved.