5PCS DS3231 Precision RTC Clock Module Memory Module for Arduino for Raspberry Pi

Product description Temperature range of -40 to +85Deg.C, timing accuracy is maintained at +/-5ppm (+/-0.432 sec / day) Provide battery backup for the continuous timing Low power consumption Footprints and functionally compatible with the DS3231 Complete clock calendar functions include seconds, minutes, hours, day, date, month and year timing , provide valid until the year 2100 leap year compensation Two calendar alarm 1Hz and 32.768kHz output Reset output and input buttons Debounced High-speed (400kHz) I2C serial bus +2.3 V to +5.5 V Supply Voltage Accuracy of +/-3Deg.C Digital Temperature Sensor -40 to +85Deg.C operating temperature range 16-pin SO (300mil) package Packing List 5 x DS3231 RTC module