Small and compact design, lcd screen display, the circle round is adjustableand it can be fixed on your finger for easy to operate . Mechanically jumps by every press, quick reaction. Reset button help to zero clearing . It is universally used as a counter in the public place such as in the dock, the bus station, also in daily use fora counting the number automatic closing functions, click and restore interfaceand the number is changeless sculpt: ring. And counts range:00000-99999, 5 digit lcd screen display,,,,counter speed: depend on human's reaction.