ITEM NAME:for Arduino I2C RTC DS1307 AT24C32 Real Time Clock Module for AVR ARM PIC S C3V9 for Arduino I2C RTC DS1307 AT24C32 Real Time Clock Module for AVR ARM PIC S C3V9 Two wire I2C interface. DS1307 based RTC without LIR2032 battery 1Hz output pin. 56 Bytes of Non-volatile memory available to user. Color:picture color Material:PC + metal Package Contents: 1 x Arduino AVR ARM PIC 51 New RTC I2C DS1307 AT24C32 Real Time Clock Module.DS1307 based RTC without LIR2032 battery. Two wire I2C interface. 1Hz output pin.