... a digital displayer for counting the germs. Capacity of the counter is from 0 to 999, the button return back to ... instrument supply with special pen, enhance the efficiency of the counter, the magnifier can be adjusted to perfect position with flexible ... % 50/60HzPower consumption of lamp: 50wMagnification: 3 timesCapacity of the Counter: 0~999 or 0-9999Diameter of the counting plate: Ø155mmExternal ...