SD Card Interface: Supports FAT16 & FAT32
3.3v Level Shifter: Prevents SD card damage
Includes Libraries: Quick start with SD & RTC
Prototyping Area: Customize with connectors & circuitry
Reliable 3.3v Regulator: Powers SD cards consistently
Arduino Compatibility: Supports Uno, Duemilanove, etc.
Included RTC: Keeps time even when unplugged
Comprehensive Documentation: Easy setup & customization
Efficient Power Use: For demanding SD cards

Stackable Design: Easy to connect with ARDUINO.
Bluetooth Support: Enable wireless communication.
Power Output: Supports 3.3v and 5v.
Protocol: USB 2.0 compatible.
Software Support: X-CTU for configuration.