This a original designed module for the DS1307 Real Time Clock. It uses Lithium coin cell battery (CR2032). The DS2032 is accessed via the I2C protocol.
Battery is not included.
You must connect this module to the IIC port on Chassis.
Free Pin-headers included. Solder them on board to make the RTC module directly sit on your Duinos.
You can directly sit this module on Arduino,Freeduino,Seeeduino and Seeeduino Mega.You can choose the Duino(Seeeduino Mega or other duinos) you are using by the switch on board.
Note: Make sure you soldered the header to correct pin-hole,or it can't be sat on your Duino.