The device is used for quickly counting objects/events. Counting occurs upon pulling the lever. Each pull of the lever will increase the counter by one. The result is erased by turning the knob clockwise. Displaying digits from 0 to 9999. Usage: - for interviewers - counting customers in business facilities - for flight attendants - counting passengers on airplanes - for bus attendants - for school trip and camp guides - for security service personnel - counting participants in mass and entertainment events - conducting inventories - counting items on production lines - competitions and social games