about salt solution used when using One Touch

I wanna ask how the fingers are soaked with salt solution? Do I really hear a sound when I hv inserted the tip properly and do something with the touch band? How is the circuit completed with the use of salt solution?

read the do it yourself senction of this forum and do a search on one touch and you will get all those answers and a lot more <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />