Dear, welcome to vernesss, here is the latest season of electronic products, I hope you like it~ Descriptions:At present, most earphones' plug have adopted 3.5mm 4-electrode standard. Although all kinds of earphone plugs are of the same 3.5mm size, different countries' plugs cannot be compatible with each other. The reason why this happens is that different countries' standard varies. There are OMTP and CTIA two standards. This adapter cable is designed to converter these two standards. In other words, OMTP earphones are compatible with CTIA phones and also CTIA earphones compatible with OMTP phones. Features: 1. Compatible plug standard: OMTP to CTIA or CTIA to OMTP2. Can be used for a long time, compact size and light weight3. Gold-plated 3.5mm female to male stereo adapter cable4. Gold-plated interface to ensure lossless sound transmission Specifications:Product name: Universal 3.5mm OMTP to CTIA Male to Female Earphone Converter Adapter CableQuantity: 1pcColor: BlackConnection type: 3.5mm male to femaleLength: approx. 4.5cm/1.77" Included: 1 X 3.5mm OMTP to CTIA Earphone Adapter Cable