Clock Calendar Function Real Time Clock Module, Real Time Uninterrupted Time Clock, For Diy Clock 13.7*13.5mm Full clock calendar function including second, minute, hour, week, date, month and year, and displays leap year valid until 2100. Low power consumption. Clock with two calendars. Reset output and input. Provides continuous timing backup battery. The device compatible with DS3231 encapsulation and function. Commodity Description: For Raspberry Pi DS3231 is a high-precision clock module. It can also be used on the motherboard. The module itself can be adapted to both 3.3V and 5V systems and no level conversion is required, which is very convenient. Features: Two-calendar Clock. Reset output and input. Low energy consumption. Provides a backup battery with continuous timing. The device is compatible with the DS3231 encapsulation and function. Full watch calendar function, including second, minute, hour, week, date, month and year, and specify leap year valid until 2100. Specification: Color: same as Pictures show Temperature range: 40 to +85 Timekeeping accuracy is maintained: 5 ppm (0.432 sec/day) Output frequency: 1 Hz and 32.768 kHz Supply voltage: +2.3 V to +5.5 V Digital temperature sensor accuracy: 3C Quantity: 1 piece Package include: 1 x module clock for Raspberry Pi Note: 1. Please allow 1-3cm error due to manual measurement. Thank you for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.