Ok from my expierences maybe I'm just being stupid or my PSP is not adaptive to the mp3 file, but not to let anyone down this did not work for me at all I played this around mosquitos on a patio table that were biting everybody and then a mosquito flew right on the PSP as it was playing the psp moz. And that same mosquito landed on my arm and starting sucking me dry. Sry guys but I wouldn't bring this to a cook out as your repellent.