Features:
Real time clock (DS1307) allows time stamping and battery backup keeps time even when the data logger is not in use
SD card interface allows saving data to SD card with FAT16 or FAT32 format
3.3V regulator provides reliable voltage source for SD card
Works directly with Aduino UNO, Duemilanove, Diecimila, Leonardo or ADK/Mega R3
Requires 3V CR1220 battery.
SD card and battery are not included.