: You must solder tiny wires to the SPI pins on the Bluetooth module.

: If your primary goal is just to identify the device more easily on your own phone or PC, you can often rename it within your device's Bluetooth settings. On Android

It sounds simple, but for DIY enthusiasts building multi-room audio, physical labeling is the most effective tool. Use a label maker to put the unique ID or the local name you assigned on the outside of the project box. How to Rename VHM-314 on Your Phone (Local Only)

Many users find that modifying these boards or adding resistors (like a 220-ohm or 2.1K Ω resistor) can help eliminate static background noise. Volume Issues: