The latest development from Vive Ultimate Trackers is the addition of beta support for PC VR. - UploadVR

Vive Ultimate Trackers now have beta support for PC. These trackers use inside-out tracking technology to offer full body tracking without the need for base stations. They are smaller and heavier than previous trackers, with a battery life of up to 7 hours. Each tracker is priced at $200, with a required USB-C dongle costing an additional $40. To attach the trackers to your body, you'll need the TrackStraps by Rebuff Reality. Previously, the dongle only supported HTC's standalone headsets, but there is now a beta program for connecting it directly to your PC for use with any PC VR headset. For more information, visit the source at UploadVR.

Source: https://www.uploadvr.com/vive-ultimate-trackers-pc-support/