Specifications:
Voltage Supply: 2.2 V ~ 5.5 V (for RTC).
Time Format: HH: MM: SS (12/24 hr).
1 Hz output pin SQW.
Date Format: YY-MM-DD-dd.
DS 3231 based RTC with 2032 Battery Holder.
32 KHz output pin 32K.
Size: 38mm x22mm x14mm