The HTC Vive tracker was one of my favorite devices at CES 2017. HTC and third parties can attach the Vive tracker to any device and have it fully tracked in Virtual Reality.
Up until now, the Vive tracker was only open to accredited developers. However, HTC has opened this up to anyone with a developer account. Which means if you want a tracker, just sign up for a developer account and you are ready to go.
Also included with your developer tracker are a USB cable, a power adaptor, a 2.4GHz wireless adapter, and a cradle.