Features: DS3231 rtcs Module ensures precise timekeeping (±2 minutes/year) with temperature compensated technology, offering 3.3V/5V compatibility and CR2032 battery backup for uninterrupted operations. Integrated I2C interfaces simplifies for connectivitys, while the builts in temperature sensors and low power optimizes performances for IoT and automation projects. for electronics enthusiasts, educators, and engineers developing data loggers, home systems, or industrial controllers requiring real time trackings. Maintains accurate timestamps in power sensitive applications like environmental monitoring, robotics, and battery powereds prototypes, even during outages. Prelabeled pin streamlines setups for professional crafting time critical across multiple platforms. Specifications: Materials: Size: 13.7x13.5mm/0.54x0.53inch Quantity: 1PC, 3Pcs(optional) Package Includes: 1PC DS3231 Real Time Clock Module note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.