Pros: Got it for a good price ($9.99). I wanted it to make conference calls from my iPad mini. Hooked up an old Teac MC-10 mic, the kind with a 3.5 mini-jack (bought years and years ago from Radio Shack), to the mic input. Because the inputs on the Startech were so close together, I had to put a short extension (male-female) cord into the headphone input. At the end of that, I put an ordinary splitter (two ring). Then I proceeded to put two sets of headphones into the splitter. Had stereo in both. No loss of volume in the earphones. The mic is cheap and maybe the pickup isn't the greatest, but it really worked! Big plus, the call did not sound like a speakerphone call. Would recommend it.

Cons: The input (male end) of the mic was a bit oversized, because it needed a 1/4 to 3.5 adapter. This might have contributed to the closeness issue of the mic and headphone inputs.

Overall Review: Shouldn't have paid for 2-3 day shipping. Although it did come in three days, the cost was $5.99 or something. Supersaver shipping makes this item a real buy.