Amazon.com: Skywin VR Tracker Straps for HTC Vive System Tracker Puck (2 Pack) - Adjustable Straps for Hand Foot Object and Full-Body Tracking in Virtual Reality : Video Games
HTC Announces Face-tracker for Vive Pro and Vive Tracker 3.0
HTC VIVE Virtual Reality System Tracker (99HANL002-00 ) - Newegg.com
HTC Debuts Updated Vive Tracker For SteamVR 2.0 At MWC 2018