It’s a small and low-cost MP3 module player with a simplified output directly to the speaker. It can be used as a stand-alone module with an attached battery, speaker, and push buttons or used in combination with an Arduino UNO or any other with RX/TX capabilities.
This perfectly integrates the hard decoding module, which supports common audio formats such as MP3, WAV, and WMA. Besides, this module also supports TF card with FAT16, FAT32 file system. Through a simple serial port, you can play the designated music without any other tedious underlying operations.