Δεν το έχω παρατηρήσει, αλλά :
Auto Receive
With auto receive, the watch receives the time calibration signal automatically up to six times a day (five times a day for the Chinese calibration signal). When any auto receive is successful, the remaining auto receive operations are not performed.
Αυτο τουλάχιστον αναφέρει το manual του GWM-5610.