Anycubic DS3231 AT24C32 IIC Module Precision Real Time Clock Memory Module for Arduino(Battery Included) Operating voltage :3.3 - 5 .5 V Memory chips: AT24C32 Clock chip:DS3231 Real time clock generator seconds, minutes, hours, day, date, month and year timing and provide valid until the year 2100 leap year compensation Can be cascaded with other IIC device, 24C32 addresses can be shorted A0/A1/A2 modify default address is 0x57