The modelling similar hour glass, is only it does not need the inversion back and forth, also does not have the sand in flows slowly. The clock uses the revertex and the metal makes, the circular cone base digital presentation “the hour”, the crown digital presentation “the minute”, the crown surface middle small turntable may see clearly in “the hour glass” clock\'s active status, looks like sand one one to fall, the time also passed on one second one second place.