Module Parameters:
1. Size: 38mm x 22mm x 14mm/ 1.5 x 0.87 x 0.55 inch .
2. Weight: 7g.
3. Clock Chip: high-precision clock chip DS3231M.
4. Memory Chips:. AT24C32 (storage capacity of 32K).
5. Operating Voltage :3.3 - 5 .5 V.
6. Clock Accuracy within Range: 0-40 ℃, accuracy 2ppm, about 1 minute in error.
7. Chip Temperature Sensor Comes with an Accuracy of ± 3 °.
8. Real time clock generator seconds, minutes, hours, day, date, month and year timing and provide valid until the year 2100 leap year compensation.
Product Highlights
1. Programmable square-wave output
2. RST output/push button reset debounce input.
3. Two time-of-day alarms. Simple serial interface connects to most microcontrollers.
4. IIC bus interface, the maximum transmission speed of 400KHz (working voltage of 5V)
5. Can be cascaded with other IIC device, 24C32 addresses can be shorted A0/A1/A2 modify default address is 0x57

Wiring Instructions (for example):
SCL → A5
SDA → A4
VCC → 5V
GND → GND

Note:
Battery not included.

Package Included:
1 x DS3231 Precision Real time Clock RTC Module
10P Male- female cable