Motion Trackers can be used continuously for over 25 hours in compatible games. If used for one hour a day, and auto-sleep is activated when the headset is removed, it can last 3 weeks without charging. Each Motion Tracker, including the socket, has 12 infrared sensors. The tracker alone carries one 9- IMU sensor. While tracking, sensors track and transmit motion data at a frequency of 200Hz. hold the controllers and wear two ankle trackers that have been calibrated through the Motion Tracker app.Perfect for motion or recognizing movement in games. In Full-Body Tracking Mode, Motion Tracker has a latency of approximately 20 milliseconds for motion capture, an average position deviation of 5cm, and an average angular deviation of as low as 6°. The accuracy for detecting and matching stepping actions is no less than 98%. Color:As Shown Material:Plastic Knitted Cloth Package Contents: 2 * body tracking devices 1 * charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.