The product works great the only downside is that you cannot easily remove the battery if you need to replace it . The setup was pretty easy I only had to load a kernel module ( the drive) . Overall it's a good purchase.
1. Within -40 to 85 Deg.C temperature range, timing accuracy is maintained at 5ppm ( 0.432 sec / day ). 2. Provide battery backup for continuous timing. 3. Low-power. 4. Device package and function compatible with the DS3231. 5. Complete clock functions include seconds, minutes, hours, day, date, month and year timing, and provide valid to 2100. 6. Two calendar alarm. 7. 1Hz and 32.768KHz output. 8. Reset button and button input. 9. High-speed ( 400KHz ) I2C serial bus. 10. 2.3 V to 5.5 V supply voltage. 11. 3 Deg.C accuracy digital temperature sensor. 12. -40 to 85 Deg.C operating temperature range. 13. 16-pin SO ( 300mil ) package. 14. Material: Fiber components.
Dimensions and Weight
Product weight: 0.0030 kg Package weight: 0.0060 kg