Agreed. The iphone xs will work with a 50w wireless fast charge. Or the handle moves out of the shooting range of the headset camera, the tracking will be lost, and there is a tracking dead Angle. However, the relatively new Dachang VR will increase the side camera to reduce the dead Angle, and after the camera has a problem, it can also rely on the built-in gyroscope accelerometer algorithm to predict that as long as it does not leave the camera range for a long time, the tracking will not be lost, but the error will gradually increase.