I've seen several comments from other users receiving defective units, and they complimented the manufacturer's customer service

The new unit is perfect.

AN EXCHANGE PLEASE I HAVE BEEN SENT A FAKE BAL M50X UNIT!!

Heavily disappointed, though I won’t rule out having a defective unit, I would not purchase again.

The manufacturer sent me a replacement unit directly and the new unit is much better than the first 2

The shame of is, the unit looks great, the concept is perfect,but, for some reason execution of the idea struggles.

After reading some other reviews, I was initially worried about it falling out, but it appears that the manufacturer has corrected that issue (or the other reviews had faulty units): If you look closely, at least on mine, there are detents for the pin in the headphones to lock into the adapter's plug.

Not a bad unit, attaches seamlessly and pairs very easily on droid and i devices

I must have received a defective unit

Only suggestion I would have aside from fixing the whine (Which could have been a defective unit) is have a through jack

Overall this unit feels flimsy, the power switch, the individual button clicks

Today, the unit completely died.

Maybe I received a defective unit

I was hoping i had just received a defective unit the first time, but i think that's just part of the product (as the static was still there with the second order)

When you press on the volume buttons, you end up applying torque on the 2.5mm male jack as well as rotating the unit ever so slightly around the Z-axis until the ends of the unit hit the cups

It's a shame that this didn't pan out as well as I

n’t be how the product normally works