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. Turn on the Motion Tracker and open the Motion Tracker app on your headset. Click "Pair" to auto-pair or "Calibrate" to recalibrate, and simply follow the guide. The calibration process takes around 5 seconds. Each Motion Tracker, including the socket, has 12 infrared sensors. The tracker alone carries one 9-axis IMU sensor. While tracking, sensors track and transmit motion data at a frequency of 200Hz. In Full-Body Tracking Mode, the 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%. Full-body motion tracking data can be shared with SteamVR to stream and play motion-sensing games. Specifications Hign-concerned Chemical:None Support wireless connection:YES Model Number:Motion Tracker2.0 Compatible :For VR Colour:As Shown Material:ABS The actual product may have slight color difference or difference, which not affect the use Package Contents: 2 * Motion Tracker 1 * Instructions in Chinese and English 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.