ITEM NAME:for Arduino I2C RTC DS1307 AT24C32 Real Time Clock Module for AVR ARM PIC SMJ2W6 for Arduino I2C RTC DS1307 AT24C32 Real Time Clock Module for AVR ARM PIC SMJ2W6 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.