This module allows reading and writing on micro SD card with a microcontroller board such as Arduino. Technical data • Operating voltage 4.5 - 5.5V DC • Supports Micro SD Card memory cards up to 2 GB or Micro SDHC up to 32 GB • onBoard 3.3-V voltage regulator • Communication via SPI • Dimensions: approx. 45 x 58 x 8 mm