i was getting really frusterated because i couldnt even get a sound out of it. i found out hat my problem was because i misunderstood the directions that it came with. this morning i put the call in and reread the instructions. my problem was i was sticking the tip of my tongue on the middle of the latex. didnt work to well. i was supposed to stick the middle of my tongue on the latex and the tip against my teeth. now i am getting sound out of it but nowhere good enough to use in the feild. thnx everybody