https://developer.vive.com/resources/hardware-guides/vive-ultimate-tracker-guidelines/
VIVE Ultimate Tracker Guidelines - Developer Resources
vive ultimate tracker
https://www.vive.com/us/accessory/vive-ultimate-tracker/
VIVE Ultimate Tracker - Full-Body Tracking, SteamVR Support
HTC VIVE's new all-in-one tracker. Track your whole body in VRChat and other immersive experiences. Now compatible with SteamVR-supported headsets!
vive ultimate trackerfullbody