Here are the key features and components of this module:

Support for TF Cards and U Disks: The module allows you to play digital audio files stored on microSD cards (TF cards) and USB flash drives (U disks). This flexibility enables you to use different storage media to store your audio files.

MP3 Decoding: Most of these modules are specifically designed for decoding MP3 audio files, which is one of the most common audio formats used for compressed digital audio. MP3 decoding allows for efficient storage and playback of audio files.

Non-Destructive Decoding: The term "non-destructive decoding" typically implies that the audio decoding process does not introduce a significant loss in audio quality. It aims to preserve the original audio fidelity during playback.

Self-Powered: The module is usually designed to be powered independently, often requiring a DC power supply within a specified voltage range. This ensures stable and reliable operation.

Audio Output: The module provides audio output connections, such as speaker terminals and/or headphone jacks, allowing you to connect external speakers or headphones for audio playback.

Control Interface: There are usually control buttons on the module for functions like play, pause, skip, volume control, and mode selection (TF card or U disk). These controls enable you to navigate and manage your audio playback.

Auxiliary Inputs:Certain models may include auxiliary input ports, which allow you to connect external audio sources like smartphones, tablets, or MP3 players.