Features SD card interface works with FAT16 or FAT32 formatted cards 3 3V level shifter circuitry prevents damage to your SD card Real time clock RTC keeps the time going even when the is unplugged Included libraries and example code for both SD and RTC means you can get going quickly Prototyping area for soldering connectors circuitry or sensors Onboard 3 3V regulator is both a reliable reference voltage and also reliably runs SD cards that require a lot of power to run Works with UNO Duemilanove Diecimila Leonardo or ADK Mega R3 or higher ADK Mega R2 or lower are not supported Specification Size 68 x 53 x 23mm approx Regulator voltage 3 3VBattery CR1220 3V Not includes Note This product has red and blue color the color is random delivery File download Click to openPackage included 3 x Data logger module