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you may have something here. I took a speed reading class in college and it eecommended the note card as well. this could have applications specifically to "speed reading" by combining the tool and performance measurements to help people track their improvements. Voted!
Love this concept. Are you sure it can alarm if unit itself is unplugged or if the ac adapter was unplugged from the laptop?
I submitted a similar idea on here over a year ago but mine didn't have the portability yours does. Mine was meant to be hooked to the shower head for people that like to shave in the shower. But I love the idea of yours for service men. Voted.