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2 formatted cards. 3.3v level shifter circuitry prevents damage to your SD card
Real time clock (RTC) keeps the time going even when the Arduino is unplugged. The battery backup lasts for years
Included libraries and example code for both SD and RTC mean 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 Arduino UNO, Duemilanove, Diecimila, Leonardo or ADK/Mega R3 or higher. ADK/Mega R2 or lower are not supported
Note:Battery is CR1220 3V,we ship without battery!Hope you can understand.
2PCS*Data Logger Module Logging Shield Data Recorder Shield for Arduino UNO SD Card
2PCS Data Logger Module Logging Data Recorder Shield for Arduino UNO SD Card