Das macht sie glaube ich schon Standard mässig ( siehe Anleitung) :

"Make sure firewall doesn't block NTP (Network Time Protocol) *.pool.ntp.org services.
During its work LaMetric can adjust it's time to be accurate. But due to a firewall (some routers have firewall settings), it can not do so. This may cause time on the LaMetric to drift and as a result, mobile client will not be able to communicate with LaMetric."

the clock gets the time from the network !