Five digital mechanical counter. Advantage: New Crisp, high visibility, digital display for optimum readability in all ambient lightingLatest technology, modern materials give Max. Dependability at speeds to 250RPM of right wheel rodPositive action knob resetBuilt-in precision totalizer accumulates up to 99 999 999 units, delivery display 5 digitalAcetal resin components for smooth operatiion and extra long lifeFits all popular flow meters.