... time display: 1.2 set of clock alarm; 2.World time display; 3.8 digits calculator; Clock calculator with world time display YG-6001 ... 2199,12h/24h mode;2, Alarm clock, can set alarm twice,3, 8 digits calculator, with Four Arithmetic Operations,percentage, M+ ,M-,MRC ... ;3, World time checking system for 16 cities;4, ...