Features Reliable Timekeeping Assurance: This battery-powered real-time clock ensures accurate time tracking even during power failures or reprogramming events Versatile Application Use: Ideal for data storage, clock construction, time stamps, timers, and alarms, making it perfect for various microcontroller projects Dual Voltage Compatibility: Designed to operate seamlessly with both 3.3V and 5V power supplies, providing flexibility for different setups and logic voltages Excellent for Raspberry Pi: Optimized for use with Raspberry Pi and similar single-board computers, enhancing your projects with precise timekeeping capabilities Compact Design for Easy Integration: The small, space-saving design allows for effortless installation in diverse projects without sacrificing valuable space Features: 1、This is an excellent battery-powered real-time clock, even if reprogramming or power failure, your microcontroller project can track the time 2、This module is very suitable for data storage, clock construction, time stamps, timers and alarms, etc. 3、Equipped with PCF8523 RTC, it can work under 3.3V or 5V power supply and logic voltage 4、Works well when used for Raspberry Pi (or similar single？board for linux computer) 5、The real-time clock module is small and compact, suitable for installation in various projects, and does not take up space Specification: Item Type: Breakout Board Color: Blue Package List: 1 x Module 1 x Pin Note: betweendiv>1. CR1220 battery is not included with this product. We recommend that you purchase a coin cell battery to use with this product.between/div>betweendiv>2. PCF8523 is not a high？accuracy device, it may be lost or increased by up to 2 seconds in a day. For high？accuracy, temperature？compensated alternative products, please check DS3231 accuracy RTC.between/div>betweendiv>3. If you need DS1307 for compatibility reasons, please check our DS1307 RTC group discussion.between/div> Package List 1 x Module 1 x Pin