The receiving head is successfully connected to the console by inserting the host, and the LED light always be on, with one light and two lights on lashing indicates that the connection was unsuccessful. Note: If the device is turned on but not played, it automatically enter standby mode. Once the MODE/ button is activated, the light flash slowly during charging, indicating successful connection to the host A light is always on. Note: When using a 3.7V carp battery, the battery voltage drops to 3.4V If the light is constantly on, it flash slowly. If there is a low voltage alarm, it needs to be . Using 3V (No.5, ) When there is a thousand batteries, there is no low voltage alarm, so if you can't , need to replace the battery. Core photos can only be connected wirelessly, not wired The USB charging port only supports the charging function of the charging head and cannot be connected to data Colour:Black Material:PC+Plastic Package Contents: 4 x Joystick Encoder(Due to different product batches, the appearance , which does not affect the use) 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.