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- 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. Hign-concerned Chemical:None Support wireless connection:YES Model Number:Motion Tracker2.0 Compatible :For VR The actual product may have slight color difference or difference, which not affect the use. Colour:As Shown Material:plastic 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.