The Whadda WPI304 shield will prove useful for data logging with your Arduino. Can be easily assembled and customised for any data logging project.\nThe SD card interface works with FAT16 and 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.\n\n--Voltage: 3.3 V - 5 V\n--Protocol: SPI\n--Dimensions: 52 x 30 x 12 mm\n--Weight: 8 g\n--Required library: SD.h\n\n--\nOur eBay Store\n\nWhadda WPI304N SD Card Logging Shield For Arduino\u00AE (2 Pcs)\n\nProduct Details\n\nThe Whadda WPI304 shield will prove useful for data logging with your Arduino. Can be easily assembled and customised for any data logging project.\nThe SD card interface works with FAT16 and 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. \n\n--Voltage: 3.3 V - 5 V\n--Protocol: SPI\n-;