What do the different colors of the indicator on the Xiaomi Soundbar 2.0ch mean?

The Xiaomi Soundbar 2.0ch has an indicator light located in the upper middle part of the front.
For your reference, the meanings of the indicator colors of the Xiaomi Soundbar 2.0ch are as follows:
1. When the input signal source switches to Bluetooth, the indicator light turns blue;
2. When the input signal source switches to S/PDIF, the indicator light turns green;
3. When the input signal source switches to Auxiliary input, the indicator light turns red;
4. When the input signal source switches to Optical input, the indicator light turns orange.