Model Number:Health Gearrbkf4dn5ph Product Dimensions:8 x 4.8 x 1.5 cm; 10 Grams Special Features:Large Display Item Weight:10 g Features:- Within -40C to +85C temperature range, timing accuracy kept at5ppm (0.432 sec / day)- The module itself can be adapted to 3.3 V and 5 V system- Complete clock calendar functions include seconds, minutes, hours, day, date, month and year timing , provide valid until the year 2100 leap year compensation- 1 Hz and 32.768 kHz output- RTC Clock Module has the characteristic of low power consumptionAccuracy of3digital temperature sensorSpecifications:Temperature range: - 40~85Weight: 2gPackage included:4 x RTC Clock Module( battery are included) [Compatibility]: The RTC clock module can be adapted to 3.3 V and 5 V system without level conversion [Accuracy of 3 Digital Temperature Sensor]: Within -40 C to +85 C temperature range, timing accuracy is maintained at 5ppm ( 0.432 sec / day), easy and convenient to use [RTC Clock Module]: Complete clock calendar functions include seconds, minutes, hours, day, date, month and year timing, provide valid until the year 2100 leap year compensation [Compatibility] [Accuracy of 3 Digital Temperature Sensor] [RTC Clock Module]