- Supports OGG real-time decoder recording

- SPI interface, pin out the control signal wire

- 1 x Headset and 1 x Speaker output interface

- 1 x Microphone, used to record

- 1 x Line-in input interface

- Power indicator

- On-board 3.3V / 2.5V LDO chipset AMS-1117, providing current up to 800mA

- Single power supply, DC 5V, capacitor filter

- 12.288MHz crystal

- Pin connection with Arduino: