This ultra-miniature Bluetooth 5.0 audio receiver module is a high-efficiency wireless decoder board designed for custom DIY speakers and compact sound installations. Powered by a high-performance JL (Jieli) audio processing chip paired with a 24.000 MHz crystal oscillator, it decodes and outputs clear, low-latency stereo sound. The board features an integrated PCB copper trace antenna for reliable wireless range, micro surface-mount capacitors for low noise, and pre-milled header solder pads for straightforward power and audio wiring. It is the perfect, lightweight solution for retrofitting vintage audio equipment or upgrading speakers with wireless connectivity.