Blood cell counter is a heavy duty, 5 Key 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. 5 Key blood cell counter metal body with easy to reach height of keys Counts BASO, EOSIN, MONO, LYMPH, POLY Each key counts upto 999. Totalizer shows sum of all counters A bell sound at every increment of 100 in totalizer. Reset knobs on sides to clear the counters and totalizer