The CRL Glass Counter Pen is a unique counting aid that not only marks the edge of the glass with a felt tipped marker, it also beeps to acknowledge that the count has been recorded. This is a handy device for counting pallet loads or large stands of glass sheets. Just reset the counter to zero, and lightly tap the edge of each piece of glass. Each time a piece of glass is touched, an audible tone is heard, the felt tip marks the glass (so that it is not recounted), and the count is recorded and displayed on the LCD screen. Use it to count inventory parts, and tally samples received. Touch, sound, and count occur simultaneously.