ARDUINO COMPATIBLE DATA LOGGING SHIELD

Arduino compatible data logging shield especially designed for Arduino. Supports FAT16 or FAT32 card formats. Real time clock module keeps the time even when the Arduino is off. Compatibility: Arduino UNO, Duemilanove, Diecimila, Leonardo, ADK/Mega R3 or higher. Not compatible with ADK/Mega R2.

For more information, refer to

https://arduino-info.wikispaces.com/DS1307_RealTime_Clock_Brick
http://www.instructables.com/id/Logger-Shield-Datalogging-for-Arduino/
Features

stackable headers
reset button
prototyping area (102 solder pads) for soldering connectors, circuitry or sensors
back-up battery for RTC included
uses the Arduino SD and RTC libraries
with onboard 3.3 V regulator to run SD cards that require a lot of power