Feature:1. Dimension: 38mm* 22mm * 14mm.2. Weight:. 8g3. Working voltage : 3.3 -. 5 .5 V.4. Clock chip: high-precision clock chip DS3231.5. Clock accuracy within range :0-40 ??, accuracy 2ppm, about 1 minute in error.6. Programmable square-wave output signal.7. Two time-of-day alarms. Simple serial interface connects to most microcontrollers.,Real-time clock, it can generate seconds, minutes, hours, day, date, month and year, and provide time until 2100, and with leap year compensation.8. Internal chip temperature sensor comes with an accuracy of ?à 3 ?? 9. Memory chips:. AT24C32 (storage capacity of 32K).10. IIC bus interface, the maximum transmission speed of 400KHz (working voltage of 5V).11. IIC other devices can be cascaded, 24C32 address can be modified by a short circuit A0/A1/A2, the default address is 0x57. 12. RST output/push button reset debounce input.13. Battery-backup input for continuous time keeping.

Package Included:1PCS x Diymore DS3231 AT24C32 IIC High Precision RTC Real Time Modules

Note:Don't include battery ( Rechargable Battery LIR2032)in the item.