• Micro SD card reader module designed for data transfer and mass storage in electronic projects • Compatible with Arduino and other microcontrollers via SPI interface • Allows reading and writing SD cards through Arduino programming • SPI interface for fast and stable data transmission • Supports Micro SD and Micro SDHC cards for various storage needs • Integrated level conversion circuit, compatible with 3.3V and 5V voltages • Push-pull socket that makes card insertion and removal easy • 4 mounting holes of 2.2 mm for simple and secure installation • Uses only 4 I/O pins from the Arduino • Module dimensions: 42 mm x 25 mm x 5 mm • Includes 5 Micro SD card modules • Easy to handle, with detailed instructions for beginners