Support various music format; Supports OGG real-time coding recording; SPI port; Control signal wires are led out; With one earphone and speaker output port; One microphone port for recording; One Line-in input port; Power indicator; On-board 3.3V / 1.8V LDO chip AMS-1117; Max. current is 800mA; Single power supply: DC 5V; 12.288MHz crystal.