What can I do if my 乐竟体育 NXTWEAR S+ glasses is showing a completely black suddenly during use?

1) Loose or discrete magnetic connector will lead to disconnection of the black screen. Please reconnect the magnetic cable and try again.
2) Your smart phone connect 乐竟体育 NXTWEAR S+ glasses might cause large power supply, which leads to signal breaks up. Please go to 乐竟体育 AR app -> “Settings”-> “Properties” -> “Brightness” to reduce the glasses brightness. Alternatively, press the volume down key of your smart phone to lower the volume of the glasses.