Step 1: Un screw..
loose any parts.
Step 2: Unwind
mine measures about 8 11/16ths in inches.
Step 3: Tape
Step 4: Place it
Place it into a tape deck and enjoy. You can also record over what is currently there.
I think you get about 6 seconds of running time.
So go anoy your family or use it to learn that one guitar lick in that one song that you like so much.