Specification Brand : Fafeicy BulletPoint1 : [Wide Temperature Range] Operating from -40°c to +85°c, this clock module offers precise timing with ± 5ppm accuracy. BulletPoint2 : [Stable Output Provides 1 hz and 32.768 khz outputs for reliable timekeeping. BulletPoint3 : [Accurate Temperature Reading] Incorporates a digital temperature sensor with ±3℃ accuracy for optimal performance. BulletPoint4 : [Complete Timekeeping Functions] Enjoy full clock calendar features including seconds, minutes, hours, day, date, month, and year. BulletPoint5 : [ System Compatibility] Suitable for both 3.3v and 5v systems, ensuring versatility in usage. ItemName : RTC Clock Module, Memory Module for, Timing Accuracy of ± 5ppm, with Low Power Consumption, -40 ° C to + 85 ° C Temperature Range, Suitable for 3.3V and 5V Systems ItemPackageDimensions_Height : 4 centimeters ItemPackageDimensions_Length : 13 centimeters ItemPackageDimensions_Width : 9 centimeters ItemTypeKeyword : clock-integrated-circuits Manufacturer : Fafeicy ModelName : Fafeicyaefrwgxgzt ModelNumber : Fafeicyaefrwgxgzt NumberOfItems : 1 PartNumber : Fafeicyaefrwgxgzt ProductDescription : Specifications: Temperature range: - 40~85℃ Weight: 2g Package included: 8 x RTC Clock Module( battery are included)