Tester

I was considering adding an LED to the tester, and today I was fiddling around with a junk mail code key. I pulled the tab and it revealed a number, I was sure it was a winner. So instead of taking it to the dealership to claim my new car. I began to check it over it small embossed print on the back it said not a toy  (hum, okay I thought, yeah it's junk)  then I notice it said " it's electronic" so I grabbed my Leatherman and dissected it. Yup just as I suspected it .... Drumroll please... Junk. Oh. It's began to illuminate a 5 digit number, something is actually in there and I got to know what it is. So popped it apart and couple batteries jumped out along with a wire clip and plastic chip and piece of folded wire. On closer inspection the folded wire is an LED mine for the innovating and a couple batteries to make it shine, literally. Not bad for free.