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

The module itself can be adapted to 3.3V and 5V system 1 Hz and 32.768 kHz output Accuracy of +/-3 Deg.C Digital Temperature Sensor Complete clock calendar functions include seconds, minutes, hours, day, date, month and year timing , provide valid until the year 2100 leap year compensation temperature range:- 40 to + 85 Deg.C