Digital Component Counting Pen:

The Digital Counting Pen is a combination marker pen and digital counter designed for the lab and plant. Each time a black mark is made with the felt-tipped pen, it automatically sounds a beep and the LCD displays the count. It is very useful to count components, packages and during inventory taking. Durable ABS plastic unit provides audio/visual count to 99999 with reset button, on/off switch and pen cap.