10. How to check and switch the working state of the BTR5 2021?

【How to check its working state?】
1. The BTR5 2021 has no indicator light and the display screen shows required information.                                                 
2. When Bluetooth is working normally, the screen will display all the information, such as pairing, re-connection, Bluetooth format, synchronous battery level and volume.
3. When the USB DAC is working, it will display the sampling rate, synchronous battery level and volume.
4. When there is only 1 level of battery left (low battery), it is suggested to start the charging. When the battery voltage is too low, it will automatically shut down.  When charging with the device on, the charging icon will scroll on the screen. But when charging with the device off, the screen will turn off after the icon scrolls for 5s.

【How to switch its working state?】
1. Hold the power button for about 2s to enter the setting menu. Short press the power button to switch pages, and the volume '+-' button to make selections. On the menu page, hold the power button for about 2 seconds to exit the menu. If it fails, double press the power button to enter settings.
2. The menu displayed on the BTR5 2021 is just part of them. You can also go to the FiiO Control App to make the same settings.