Clock
The Clock settings is to control the real time clock source in the router.
Time Sync:
option to specify the source that the router uses to
synchronise its internal system clock. The source can be Cellular
Network, NTP Server, or Manually Input.
NTP Server:
the IP/URL of the NTP server if using NTP server for clock
source.
Time Zone:
option to specify the time zone the router is located.
Current Date & Time:
The current date & time information. User can also
manually enter a time here if Time Sync is set to Manual.