RTC 3.3V/5V RTC I2C DS3231/DS3231SN Real Time Clock Modul For Arduino A3GE

Mini RTCpro DS3231. DS3231 AT24C32. 4 clock chip: high-precision clock chip DS3231. DS3231 RTC. Use DS3231SN precision clock chip, built 32.768 crystal. DS3231SN 3 in 1 LED. DS3231SN IC. RTC IIC I2C IIC DS3231S.

eBay