Is ideal for rapid,accurate counting & recording of bacteria & mould colonies in biology,zoology, bacteriology, pathology laboratories or any place where colony countingis a regular routine. Colony counter grid is illuminated with fluorescent lampfor uniform cool-light Illumination and is provided with a magnifying glass forease of viewing. Special Pen type probe allows marking on Petri dish with anaudio beep and counting Simultaneously. Counting is registered on 4 digitresettable digital counter