I have two other atomic clocks that work fine.However this one, purchased a little over a month ago, unfortunately does not belong to that elite set of working atomic clocks.It will set itself OK when a new battery is installed.  However when, a few hours or days later, it goes to adjust itself during the night, it will eventually malfunction in one of three ways: either the second hand freezes but the minute and hour hands continue to keep time; or the second hand freezes and the clock begins to perpetually fast forward its minute and hour hands, eventually running the battery down; or the second hand gets many seconds out of sync with WWVB but keeps going.I am at this time trying to get warranty service from manufacturer. [...]