After putting a little urine on the strip, it must then insert it into the USB port for a software begins the process of ionization which will be used to assess hormone levels. For a reliable result to 99%, the test comes with 20 strips for about $ 18.
more information: http://www.thinkgeek.com/stuff/41/pteq.html
There's just something unappealing about sticking something I've peed on into my computer.
This.