DS3231 Real Time Clock Module I2C

Supports 2.2 to 5.5 V for the Real-Time Clock (RTC).
Equipped with a fast 400kHz I2C interface.
It's an extremely accurate I2C real-time clock (RTC).
Has an inbuilt temperature-compensated crystal oscillator (TCXO) and crystal.
Capable of tracking seconds, minutes, hours, day, date, month, and year.
Features a built-in 32Kbit EEPROM and a 10-bit temperature sensor with 0.25°C resolution.