we are factory of product LEDclock,can OEM Display of 50 years calendar from 2000 to 2049; Operatiing voltage: AC110V-200V / 50-60HZ; Temperature:-9°C to 48°C; 12/24 hours; Display size: year, month, day:0.8cm; hours, minutes:1.2cm; temp, lunar Calendar:0.8cm LED Digital Calendar