Product Description

Features:
DS3231SN precision clock chip, built-in 32.768 crystal oscillator
Year, month, day, hour, minute, second that can be provided in morning and afternoon data
You can output a 1Hz signal, the second output signal
You can use the CR1220 button battery to last the travel time
The pull-up resistor R1 R2 is welded to the I2C bus
Small diameter 3 cm
Pin spacing 22.86mm

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