Yogi said "You don't know what you don't know".
Well, I didn't know these earbuds are as counterfeited as openly as they apparently are. Unaware of my ignorance, I ordered them, and was reading about them on the internet only to discover the frequency of fakes. So, I asked you how to determine the validity of the earbuds once they arrive.
Well, they arrived yesterday. Below is a picture of the case, which fit the criteria you'd listed as a sign of non-authenticity. I contacted the ebay seller who did not refute the counterfeit claim but immediately offered a refund. In fact, she offered the refund far too easily, I guess the very last thing the eBay sellers want is for someone to give feedback as "FAKE EARBUDS", as that would put a damper on sales quickly.
I own a pair of Klipsch Custom-2 earbuds and expected the s4's to be in about the same caliber as the Custom-2's. These were far, far from it. So, I don't know anything for sure at this point, except I want my money back.
There was no strip in the box. There was three sets of spare ear sleeves, a cleaning tool, NO clip, and the cord was wound up like Ray Charles did it. Oh, the case was magnetic, someone mentioned that as an indicator, but I don’t' know.