Specification Brand : Agatige BulletPoint1 : Memory card interface works with FAT16 or FAT formatted cards BulletPoint2 : 3.3v level shifter circuitry prevents damage to your memory card BulletPoint3 : Real time clock (RTC) keeps the time going even when unplugged. The battery backup lasts for years BulletPoint4 : Included libraries and example code for both card and RTC mean you can get going quickly Prototyping area for soldering connectors,circuitry or sensors BulletPoint5 : 3.3v regulator is both a reliable reference voltage and also reliably runs memory cards that require a lot of power to run ItemName : Data Logger Module LoggingShield Data RecorderShield, Data LoggingShield Data Logger Acquisition Module Recorder for UNO SD Card ItemPackageDimensions_Height : 3 centimeters ItemPackageDimensions_Length : 9 centimeters ItemPackageDimensions_Width : 8 centimeters ItemTypeKeyword : industrial-data-loggers Manufacturer : Agatige ModelNumber : Agatige73890qrbpe PartNumber : Agatige73890qrbpe ProductDescription : Features: Memory card interface works with FAT16 or FAT formatted cards. 3.3v level shifter circuitry prevents damage to your memory card. Real time clock (RTC) keeps the time going even when unplugged. The battery backup lasts for years. Included libraries and example code for both card and RTC mean you can get going quickly Prototyping area for soldering connectors,circuitry or sensors. 3.3v regulator is both a reliable reference voltage and also reliably runs memory cards that require a lot of power to run. Works for Duemilanove,for Diecimila, for Leonardo or ADK/Mega or higher.Not supported for ADK/Mega R2 or lower.