Color: Blue - Quantity: 1 - Material: Circuit board - Memory storage: 24C32 32K I2C EEPROM - With LIR2032 rechargeable lithium battery and rechargeable circuit - With reading and writing function - Using time: About 1 year (Fully charged) - Provide clock signal for microcontroller - Cascade other I2C devices - With full BCD clock calendar chip of 56byte non-volatile RAM - Address and data transmission via serial cable with dual-line dual-direction - The chip can provide second minute hour etc information. - AM/PM mark for working 24-hour or 12-hour - Built-in power sensor circuit in the chip with brownout detection and battery switch function - Under battery backup mode power consumption is below 500uA - Accurate calendar up to year 2100 - Great for DIY project