Special for HTC Vive Tracker: The straps are specially designed for HTC Vive VR Tracker, including both tracker 2.0 and 3.0 versions. (Note: Trackers NOT included). For flexible installation, align the screws on the strap with the holes in the tracker base and rotate the tracker clockwise to tighten. Upgraded Tracker Belt, Belt and Hand Straps: Easily and firmly wear your trackers to any part of your body. Compared to the old version, the upgraded material, reinforced screw base, wider belt will bring you a new VR tracking experience. Full Body Tracking, Immersive Game Experience: Do you ever fix the tracker on your foot by shoelace? Is it often loose and interrupts your game? Do not worry about it again. The real immersive game experience you'll get. Easy to Use: Hand/ankle strap weighs about 35g, adjustment range: 19-27cm, belt weighs about 90g, adjustment range: 125-100cm, head strap weighs about 35g, adjustment range: 40-60cm, palm strap weighs about 35g, full length 36cm. Please mind that trackers NOT included.