Complete clock calendar function, including second, minute, hour, week, date, month and year, and indicate leap year valid up to 2100. Low energy consumption. Clock with two calendars. Reset output and input. Provides continuous timing backup battery. The device compatible with DS3231 encapsulation and function. Goods 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 power consumption.Provides continuous timing backup battery.Device is compatible with DS3231 encapsulation and function.Complete clock calendar function, including second , minute, hour, week, date, month and year, and indicate leap year valid up to 2100. Specification: Color: as pictures show Temperature range: 40 to +85 Timekeeping accuracy is maintained: 5ppm (0.432sec/day) Output frequency: 1Hz and 32.768kHz Supply voltage: +2.3V to +5.5V Digital temperature sensor accuracy: 3C Size: 1.4 x 1.3 x 1.3cm /0.55 x 0.51 x 0.51 inch Package weight: 3g Quantity: 1 pc Package included: 1 x module clock for Raspberry Pi Notice: 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 the standard.