The track devices component will update the transform of any connected devices with a frequency set by the attached timer. To change the frequency, right click on the timer and choose a different delay setting. You can use the device transform to position anything in your grasshopper definition precisely at the position and orientation of a connected headset. For instance, you could transform a model of the Hololens using the device transform in order to display where these devices currently are relative to any objects in your Rhino and Grasshopper documents.
The track hands component will update the transform of any detected hands with a frequency set by the attached timer. You can request the current transform using the Prompt input.