I ordered these headphones once but got a model whose left atrium walked badly. A simple request to return to the site, a mail seller asking me if I want a refund of the product, and presto I was repaid in not even two days without the need to return the defective model!
So I ordered these headphones again and got a working model well this time! It looks just like the S3 headphones, need I say more ... I am satisfied, both in the product by the commercial vendor and very pleasant!