drive power is 5 v battery can be commonly, usually only has the basic function of the time, in addition to materials of different style, basic not big differenceAnd the large outdoor tower clock, installed in the building walls, the power supply needs 220V of electricity, in addition to the basic function of travel time, usually can also be customized according to the requirements of the time content, at night can also see the time at the same time its material is a variety of, style is also very beautiful and beautiful can choose a large range.
