1.size: 38mm (long) * 22mm (wide) * 14mm (High)

2.weight:8g

3 .Operating Voltage: 3.3--5.5V

4 .Clock Chip:Precision clock chipDS3231

5 .Clock Accuracy: 0-40 °Within range,Accuracy2ppm,In error about1minute

6 .Belt2Calendar alarm clock

7 .A programmable square-wave output

8.Real-time clock generating seconds, minutes , hours, day , date , month and year time, and provide valid until2100Compensation leap year

9.Internal temperature sensor chip comes,Accuracy± 3 °

10 .Memory chip: AT24C32 (Storage capacity32K)

Model Number: DS3231

Package Include: 1 x Precision Clock Module DS3231SN for Arduino

 Memory Boards AT24C32 IIC 38x22x14mm