2. Key Description：
1).TIME (Time Setting)：
a、Single press to see the second position
b、Press the TIME +HR adjust hours, press TIME +MIN adjust minutes.
c、During the receiving time of RCC, long press TIME key 2 seconds will turn to the normal time display, but it's still receiving RCC signal.

2).RCC （RCC receive key）：
a、Single press RCC key,receive radio signal and adjust time
b、During receiving RCC and long press 3 seconds can exit receiving.

3).HR (Hour)：
a、Press TIME+HR adjust hour.
b、In WWVB format, single press HR key,you can view time zone in the normal display time.
c、In WWVB format, long press HR key 2 seconds and turn to time zone setting mode in normal display time. Press MIN key adjust time zone, after the adjustment HOUR key confirmed or no action within 5 seconds will confirm automatically and exit.

4).MIN (Minute)：
a、Press TIME +MIN adjust minutes.
b、In time zone setting mode, single press to adjust time zone.