Features:

• Raspberry Pi foreign highest precision clock module DS3231
• The module itself can adapt to 3.3V and 5V systems without level conversion , this is super easy!
• two. characteristic:
• -40 ° C to + 85 ° C temperature range , timing accuracy is maintained at ± 5ppm (± 0.432 s / day )
• Continuous Timekeeping Battery Backup
• Low power consumption
• The device package, and functionally compatible with the DS3231
• The complete calendar clock functions include seconds, minutes , hours, day , date , month and year time, and provide valid until 2100 Leap Year Compensation
• The two -day alarms
• 1Hz and 32.768kHz output
• Reset button to output and input jitter
• High-speed (400kHz) I2C serial bus
• + 2.3V to + 5.5V supply voltage
• The accuracy of ± 3 ° C digital temperature sensor
• -40 ° C to + 85 ° C operating temperature range