im kind of new at this, so please excuse me for my lack of knowledge. I have an e398 and would like to get an adapter that converts from 2.5mm to 3.5mm
Ive been told it needs to be stereo or else (mono=1 headphone).
can you advise me on the differences between the 3 (they seem to be the same to me):

http://www.radioshack.com/product.as...5Fid=274%2D373

http://www.radioshack.ca/estore/Prod...roduct=2740378

http://www.radioshack.ca/estore/Prod...roduct=2740397

any help would be greatly apreciated. thank you!