All electronics ship with US style plugs.You may need a voltage converter or a plug adapter.
Special Features
Working voltage:3.3-5.5V;High precision clock chip DS3231;Clock accuracy range:0-40°;Memory chip:AT24C32
DS3231 16-pin Memory Chip:With an integrated temperature-compensated crystal oscillator (TCXO) and crystal.The DS3231 is an accurate I2C real-time clock (RTC)
Feature:Integrated oscillator can improve long-term accuracy of the device.RTC maintains second, minute, hour, day, date, month, and year information. (For months less than 31 days, the end date will be adjusted automatically.)
Function:Provides configurable calendar alarms and one configurable square wave output. Address and data are transmitted in serial via I2C bidirectional bus
Note:The RTC module can be powered by CR2032 3V battery (The package does not not included battery)