How to check the current volume level on the Xiaomi Desktop Speaker?

When adjusting the volume, the RGB ambient light will display the current volume level with bar light effects corresponding to real-time volume changes. 
To check the current volume level, please refer to the following methods:
1. In the Bluetooth channel, volume adjustment is synchronized with the connected device. Check the length of the light bar or device volume display;
2. In the USB channel or the AUX IN channel, if the volume is adjusted via the Multi-function Button, you can check the light bar display. If the volume is adjusted via the source device, please check the device’s volume display.