Micro SD Card ModuleSPI interface via file system driver, microcontroller system to complete the MicroSD card reading and writing functions.Arduino users can use Arduino IDE comes with an SD card to complete the librarycard initialization and read-write directly.Power supply:4.5V ~ 5.5V, 3.3V voltage regulator circuit board.Communication interface: a standard SPI interface.Parameter: 1.Interface effect: 1.Package Included:.1 x Micro SD Card Module