RTC Real Time Clock Module 4pcs High Precision DS3231 Module with Batteries for Arduinos Raspberry Pi

Features: 1.This RTC clock module is suitable for a temperature range of -40°C to +85°C. 2.This RTC clock module body can adapt to 3.3 V and 5 V systems, 1 Hz and 32.768 kHz output. 3.This RTC clock module has a complete clock calendar function, including seconds, minutes, hours, date, date, month and year timing. 4.This RTC clock module has the characteristics of low power consumption. 5.This RTC clock module has a±3?digital temperature sensor accuracy.   Specifications: Model: DS3231 Temperature range: - 40~85? Weight: 2g   Package included: 4 x  RTC Clock Module( battery are included)