High precision: foreign highest precision clock module, motherboard can also use this module. The temperature range -40 °C to + 85 °C, time accuracy at ± 5 ppm (± 0.432 s / day). Accuracy of ± 3 °C digital temperature sensor. Compatibility: the RTC Taodul itself can accommodate 3.3 V and 5 V systems without level shifting, which is very practical. Provides battery backup for continuous timing, device package and function compatible with . Rich function: this RTC Taodul with the calendar function for full times includes seconds, minutes, hours, days, months and years that are valid up to the year 2100 leap year compensation. The high-precision IC has a battery backup. Standard parameters: 1 Hz and 32.768 kHz output RTC aodul has the characteristic of low power consumption. Four calendar alarm clock modules. Reset output and button debounce input. High speed (400kHz) I2C serial bus. + 2.3V to +5.5V supply voltage. The ability to have 3.3V and 5V logic level means that it can also be used on most types of microcontroller development cards. Energy saving: The RTC clock module is characterised by low power consumption and no level and can be plugged directly into the IO port of the without the need for additional cables or soldering.