tylectric: It works on treo 600.. Didn't work on the dog I tested it on. really high pitched though!!!-Tylectric

mightybigbox: Yikes, I can hear it alright. If its too close to me, it bothers me more than my dog (Who can't hear it...but he is old...)

envybaby: hahaha its funny. the stupid dogs r still barking n my ears r still ringing haha

paulocm: It doesn't work.

stizzie456: I don't hear it and I'm 20 but it really doesn't bother me but it annoys the hell out of my lil brothers lol

lifedrivepda: Wow just read these comments and you'll think that is rigged! this is soo funny! I'll come beck next week and see if there's more to read!!

szborowski1980: Well if you stick it up to your ear then yea its gonna hurt. Intested to see if it works. Only giving it a 5 for now. First I gotta test it

mx_rider719: THIS IS SOOOOOO COOOL

traynor: An interesting, useless application. My ears are still ringing :^|

extremsnwb: This is big in my area (south florida) kids in school do it in class because people over 40 can't hear it so they don't know why all the kids are freaking out. lol.