Specification: _x005f_x000D_ Origin: Mainland China _x005f_x000D_ Type: Module _x005f_x000D_ Condition: New _x005f_x000D_ Description: _x005f_x000D_ DS1307 is a low-power, full BCD code clock calendar real-time clock chip with 56 bytes of non volatile RAM. The address and data are transmitted through a two wire bidirectional serial bus. The chip can provide information such as seconds, minutes, and hours, and the number of days per month can be automatically adjusted. And it has a leap year compensation function. The AM/PM flag bit determines whether the clock operates in a 24-hour or 12-hour mode. The chip has a built-in power sensing circuit with power failure detection and battery switching functions. _x005f_x000D_ Product Introduction _x005f_x000D_ Using LIR2032 rechargeable lithium battery with charging circuit _x005f_x000D_ Solve the issue of DS1307 with backup battery not being able to read and write. _x005f_x000D_ After being fully charged, it can provide a DS1307 timer for 1 year. _x005f_x000D_ Compact design, 28 * 28 * 7mm _x005f_x000D_ Introduce the clock pin of DS1307 to provide a clock signal for the microcontroller. _x005f_x000D_ Can cascade other I2C devices. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! _x005f_x000D_ Please allow 1-2cm measuring deviation due to manual measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 x Tiny RTC Module Without battery _x005f_x000D_ 1 x Tiny RTC Module with battery