Ximimark 5Pcs I2C RTC DS1307 AT24C32 Real Time Clock Module for AVR ARM PIC SMD for Arduino Two wire I2C interface ?Hour : Minutes : Seconds AM/PM ?Day Month, Date - Year ?Size: 28x25x10mm ?Leap year compensation ?Accurate calendar up to year 2100 ?DS1307 based RTC with LIR2032 battery (Battery include) ?1Hz output pin ?56 Bytes of Non-volatile memory available to user ?The module comes fully assembled and pre-programmed with the current time. ?This is the DS1307 Real Time Clock Module For Arduino AVR ARM PIC. ?The DS1307 is accessed via the I2C protocol. This is the DS1307 Real Time Clock developed by one of our designer waiman. The module comes fully assembled and pre-programmed with the current time (ok, so it's our current time - MST). The included Lithium coin cell battery (CR1225 41mAh) will run the module for a minimum of 9 years (17 years typical) without external 5V power. The DS1307 is accessed via the I2C protocol. Package included?Ximimark 5Pcs I2C RTC DS1307 AT24C32 Real Time Clock Module for AVR ARM PIC SMD for Arduino Thank you very much for shopping in our store. Please feel free to contact us if you have any questions. Description: Exquisite workmanship and high quality. Welcome to buy Size :as shown Feature : fashion Style : as shown 100% brand-new high quality Note: We are very grateful to all customers for their suggestions on improving sales. If you have any dissatisfaction, please contact us to find the best possible solution. Thank you! Package included: Ximimark 5Pcs I2C RTC DS1307 AT24C32 Real Time Clock Module for AVR ARM PIC SMD for Arduino