? Digital showing various types of LED.
? Display year, month, day, hours, minutes and seconds.
? Show that the number increased or decreased on request.
? Two / three / four / five / six count-down/up display (range 0-9 count).
? Count-down/up can be arbitrarily setting.
? Punctuality memory if the powe cut.
? Room, the use of internal and external.
Optional features:
? buttons to timing.
? infrared remote setting timing.
? satellite (GPS) time service.
? computer setting timing.
? showing humidity and temperature.
