This is an 8 Key Blood Cell Counter and is heavy duty. Features: ABS outer shell can resist collision. At one hundred increment of the total record, the bell sound be heard. Rest knob can easily clear all figures. Eight Keys and one totalizer. Figure range for each window (including the totalizer) is from 0 - 999. packed in laminated card board box, duly covered with Thick Foam Blood Cell Counter 8 Key ABS Outer Shell Contains 8 Keys & one Totalizer (can counts Baso, Eosin, Myelo, Juven, Stab, Seg, Lymph, Mono) Individually Packed in Rexin Box At one hundred increment of total record, the internal bell will sound. The reset knobs on both sides can clear all the numbers to zero. Figure range for each window (including the totalizer) is from 0 ~ 999. Blood Cell Counter 8 Key ABS Outer Shell Contains 8 Keys & one Totalizer (can counts Baso, Eosin, Myelo, Juven, Stab, Seg, Lymph, Mono) Individually Packed in Rexin Box At one hundred increment of total record, the internal bell will sound. The reset knobs on both sides can clear all the numbers to zero. Figure range for each window (including the totalizer) is from 0 ~ 999.