ITEM NAME:5x I2C RTC DS1307 AT24C32 Real Time Clock Module For Arduino AVR ARM PIC SM L6A1 5x I2C RTC DS1307 AT24C32 Real Time Clock Module For Arduino AVR ARM PIC SM L6A1 100% Brand new and high quality. Shape: Same as the picture show 1. Battery Type: LIR2032. 2. Two Wire I2C Interface 3. Hour: Minutes : Seconds AM/PM, Day Month, Date - Year. 4. Leap Year Compensation 5. Accurate Calendar Up to Year 2100. 6. 56 Bytes of Non-Volatile Memory Available to User Color: picture color Material: PC+ metal Package Included: 5 x Real Time Clock Module 5 x Button Battery Note: We only provide the hardware.