Features: _x000D_ -40 C to +85 C temperature range, timing accuracy kept at 5ppm ( 0.432 sec / day)_x000D_ _x000D_ The module itself can be adapted to 3.3 V and 5 V system _x000D_ Complete clock calendar functions include seconds, minutes, hours, day, date, month and year timing , provide valid until the year 2100 leap year compensation_x000D_ _x000D_ 1 Hz and 32.768 kHz output _x000D_ RTC Clock Module has the characteristic of low power consumption_x000D_ _x000D_ Accuracy of 3 digital temperature sensor_x000D_ _x000D_ _x000D_ _x000D_ Specifications:_x000D_ Temperature range: - 40~85 _x000D_ Weight: 2g_x000D_ _x000D_ _x000D_ _x000D_ Package included: _x000D_ 4 x RTC Clock Module( battery are included) 1?40 C to +85 C temperature range, timing accuracy kept at 5ppm ( 0.432 sec / day) 2The module itself can be adapted to 3.3 V and 5 V system 3Complete clock calendar functions include seconds, minutes, hours, day, date, month and year timing , provide valid until the year 2100 leap year compensation 41 Hz and 32.768 kHz output 5Accuracy of 3 digital temperature sensor