-Time keeping: the average time difference is less than 15S

Per month under room temperature 20±5℃
- Output Length of minute hands: above 5´10^-2 N.m
- Working environment humidity: -20℃ - 50℃
-Working voltage: alternating current :220V+/-20V/50HZ

We could produce them by your detailed requests, welcome
your enquiry, thank you!