1 USB / SD Block. 2 supported formats: MP3 supports 32-320kbps in the MP3 songs. 3 Support 6 EQ sound mode selection function natural, rock, pop, classical, jazz, heavy bass. 4 support for single cycle and all the loop. 5 power and memory. 6 Power: DC3.7V 5V 12V optional 7 FM radio press the play button to automatically search for storage uni