When the watch is unable to adjust its time in accordance with a calibration signal for some reason, average timekeeping accuracy is within ±15 seconds per month.
Time signal reception is not possible when any one of the conditions exists.
While battery power is low
Power Saving Level 2
Timer countdown operation in progress
barometric pressure indications turned on
If an alarm starts to sound while time signal reception is in progress, reception will stop.
If the receive operation is successful, the time and day settings will be adjusted automatically in accordance with the Home City and summer time settings. Summer time will not be applied correctly in the case described below.
When the summer time start date and time, end date and time, or other rules are changed by authorities
Note that an internal decoding process the watch performs after it receives a signal may cause the time setting to be slightly off (by less than one second).
As of December 2014, China does not observe summer time. If China starts to observe summer time in the future, the time displayed by the watch for China may not be correct.
