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Precision DS3231 Real Time Clock Module RTC DS3231 3.3V/5V For Raspberry Pi For Arduino DIY Kit

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DS3231 AT24C32 IIC RTC Module Clock Timer Memory Module Beats Replace DS1307 I2C RTC Board (Batteries Not Included) + 20 PCS Male To Female Jumper

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AITRIP 6PCS DS3231 Real Time Clock Module RTC Sensor High Precision AT24C32 IIC Timer Alarm Clock For Arduino Raspberry Pi