DS1307 Real Time Clock (RTC) Module

Features:-

• Size: 38mm (length) * 22mm (W) * 14mm (height)
• Weight: 8g
• Operating voltage :3.3 – 5 .5 V
• Clock chip: high-precision clock chip DS3231
• Clock Accuracy :0-40 ℃ range, the accuracy 2ppm, the error was about 1 minute
• Calendar alarm clock with two
• Programmable square-wave output
• Real-time clock generator seconds, minutes, hours, day, date, month, and year timing and provide valid until the year 2100 leap year compensation