SD Card Reading Writing Module for Arduino with the on-board 3.3V regulator. This SD Card module can make your SD application easier and simple. Through programming, you can read and write to the SD card using your Arduino. With the help of this module, can use for SD Card more easily, such as for MP3 Player, MCU/ARM system control. It can be easily interfaced as a peripheral to your Arduino, and other embedded boards and micro-controllers. Through programming, you can read and write to the SD card over the SPI interface.