This module (MicroSD Card Adapter) is a Micro SD card reader module. Using the file system and the SPI interface driver, your Arduino or other MCU can read and write a MicroSD card.
Module features are as follows:
1. Supports Micro SD cards, Micro SDHC card.
2. level conversion circuit interfaces level for 5V or 3.3V
3. power supply is 4.5V ~ 5.5V, 3.3V voltage regulator on board
4. uses standard SPI communication interface
5. 4 M2 screw positioning holes for easy installation