Blood cell counter is a heavy duty, five cell counter. It records up to 999 for each cell. It also has a totalizer that show the sum of all five counters. Supplied with a protective case. Comes with protective case ABS outer shell can resist collision. Counts (BASO, EOSIN, MONO, LYMPH, POLY ). At one hundred increment of the total record, the bell sound be heard. Rest knob can easily clear all figures. Five Keys and one totalizer. Figure range for each window (including the totalizer) is from 0-999.