This is a Micro SD card reader module with SPI interface for Arduino. It supports Micro SD cards (<=2GB) and Micro SDHC cards (<=32GB), works with both 3.3 and 5 V logic level, but needs 4.5 ~ 5.5 V on power input pin (Vin).
Class 10 (SDHC & SDXC) MicroSD card with SD adapter, very usefull for Arduino SD card modules, older 3D printer models or any device that can't handle SD cards with more than 4 GB capacity.