ITEM NAME:Robotdyn Rtc Real Time Clock Ds1307 Module With Battery C2D8 Robotdyn Rtc Real Time Clock Ds1307 Module With Battery C2D8 The module comes fully assembled and pre-programmed with the current time. The DS1307 is accessed via the I2C protocol.,Two wire I2C interface. Hour:Minutes : Seconds AM/PM.Day Month, Date - Year. DS1307 based RTC with LIR2032 battery,1Hz output pin. 56 Bytes of Non-volatile memory available to user. colour:Black Material:plastic + metal size:4*8*0.5CM Package Contents: 1*RTC Real Time Clock DS1307 module