ITEM NAME:5pcs/set DS3231 High Precision RTC Clock Module Memory Module fr Raspberry Pi Descriptio n Description: Raspberry Pi DS3231 is high precision clock module. It can also be used on motherboard. The module itself can be adapted to 3.3 V and 5 V system and no level conversion needed, which is super convenient. Features: Two calendar clock. Reset output and input. Low power consumption. Provide continuous timing battery backup. The device is compatible with DS3231 encapsulation and function. Complete the clock calendar function including the second, minute, time, week, date, month, and year, and provide the valid until 2100 leap year. Specification: Color: As the pictures show Temperature Range: -40℃ to +85℃ Timing accuracy is maintained:  ± 5ppm ( ± 0.432 sec/day) Output Frequency: 1Hz and 32.768kHz Supply Voltage: +2.3V to +5.5V Digital Temperature Sensor Accuracy:  ± 3  ° C Size: 30 * 20 mm /1.18 x 0.79 inch Quantity: 5pc 16 pin SO(300mil) package Package included: 5 x Clock Module For Arduino Raspberry Pi Note: 1. Please allow 1-3cm error due to manual measurement. Thanks 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. High quality buy, happy buyï ¼ DIY DS3231 Precision RTC Board Clock Memory Module For Arduino Raspberry Pi.Raspberry Pi DS3231 is high precision clock module. It can also be used on motherboard. The module itself can be adapted to 3.3 V and 5 V system and no level conversion needed, which is super convenient.