SD-Card-Logging-Shield-For-Arduino-2-Pcs-Whadda-WPI304N-p-The-Whadda-WPI304-shield-will-prove-useful-for-data-logging-with-your-Arduino-Can-be-easily-assembled-&-customised-for-any-data-logging-project-p-p-The-SD-card-interface-works-with-FAT16-&-FAT32-formatted-cards-The-real-time-clock-RTC-keeps-the-time-going-even-when-the-Arduino-is-unplugged-Prototyping-area-for-soldering-connectors-circuitry-or-sensors-p-Whadda-WPI304-SD-Card-Logging-Shield-For-Arduino-2-Pcs-