2PCS DS3231 AT24C32 IIC RTC Module Clock Timer Memory Module Beats Replace DS...

Two time-of-day alarms
Operation voltage: 3.3-5.5V
Fast (400kHz) I2C Interface
Memory chips: AT24C32 (storage capacity 32K)
Application: Servers/Telematics/Utility Power Meters/GPS

DS3231 AT24C32 Clock Module Real Time Clock Module IIC RTC Module .
Calendar alarm clock with two programmable square-wave output .
Generating seconds, minutes, hours, day, month and year information.

Wiring instructions :

SCL→A5
SDA→A4
VCC→5V
GND→GND

Package included:
2 X DS3231 AT24C32 IIC module with battery
20 X Female to male cable

DS3231 16-pin memory chips - AT24C32 ,extremely accurate I2C real-time clock (RTC), with an integrated temperature-compensated crystal oscillator (TCXO) and crystal.
Highly accurate RTC completely manages all timekeeping functions.The device incorporates a battery input, disconnect the main power supply and maintains accurate timekeeping.
Integrated oscillator improve long-term accuracy of the device and reduces the number of components of the production line.
Provides two configurable alarm clock and a calendar can be set to a square wave output. Address and data are transferred serially through an I2C offerirectional bus.
A precision temperature-compensated voltage reference and comparator circuit monitors the status of VCC to detect power failures, provide a reset output. In addition, RST pin is monitored as generating a μP reset.