- Flexible playback options: This MP3 module supports both hard drives and TF cards, allowing you to store and play audio files with up to 16 GB on TF cards and 32 GB on hard drives. - Automatic mode switching: If no card is detected at startup, the device automatically switches from TF card mode to hard drive mode, ensuring uninterrupted listening. - Easy controls: A simple button layout lets you switch tracks, adjust volume, and pause or play audio quickly. - Real-time status LED: A red LED indicator shows playback status at a glance, so you can monitor operation without checking the device. - Practical design and compatibility: Compact, durable module compatible with TF cards and hard drives within the listed capacities, suitable for car, home audio, or DIY projects. - Use scenarios: - In-car stereo setup for road trips, with music stored on TF card or HDD for offline playback. - Retail or cafe background music, where automatic mode reduces setup steps. - DIY speaker projects or home audio enclosures, enabling simple, reliable playback control.