Weight: 8gOperating voltage :3.3 – 5 .5 VClock chip: high-precision clock chip DS3231Clock Accuracy :0-40 ℃ range, the accuracy 2ppm, the error was about 1 minuteCalendar alarm clock with twoProgrammable square-wave outputReal time clock generator seconds, minutes, hours, day, date, month and year timing and provide valid until the year 2100 leap year compensationChip temperature sensor comes with an accuracy of ± 3 ℃Memory chips: AT24C32 (storage capacity 32K)I2C bus interface, the maximum transmission speed of 400KHz (working voltage of 5V)
