1. Dual decoding supports MP3, WMA, WAV, FLAC, and APE audio formats. 2. Built-in microphone interface. 3. Bluetooth 5.0 support. 4. Recording function supported. 5. 12V power supply. 6. Color digital display screen. 7. USB interface support (for USB flash drives). 8. Power-off memory function. 9. Infrared remote control with up to 10-meter operating range. 10. LINE IN external audio source input support. 11. FM radio support with frequency range 87.5–108.0 MHz. Button Functions: 1. VOL+: Short press to skip to next track; long press to increase volume; double-click to switch to next folder. 2. PAUSE: Short press to toggle play/pause; long press to switch to FM radio. 3. VOL–: Short press to skip to previous track; long press to decrease volume; double-click to switch to previous folder. 4. REPEAT: Press once to enable single-track repeat; press again to disable and resume sequential playback. 5. EQ: Select from six preset sound modes — Classical, Jazz, Rock, Heavy Bass, Pop, Normal. 6. MODE: Cycle through USB / TF card / FM radio / LINE IN / Bluetooth modes; long press to start recording; press again to stop recording and play back the recorded file. Recording supports audio input, FM radio, and Bluetooth sources only. A compatible storage device (USB drive or TF card) must be connected during recording. Color: As shown in image Material: Plastic Package Includes: 1 x Audio Codec Note: Due to lighting conditions and screen variations, actual product color may differ slightly from images. Measurement tolerance: ±1–3 cm.