No Clock , No Watch. / watch

One of the crucial tools in tests is your pen. You can
put this product into the end of your pen to see fast
and conveniently how much time is left by the number
on the LED and the gauge. So, it helps you to divide
the time efficiently in tests.
push - it adds 10 minutes at each push. Pushing 6 times,
or 1 hour, the upside of the display shows the number
1 in green, (If 2 hours, the number 2 in green) If you
hold 3 seconds with pushing, the number is back
to 0 min.