ITEM NAME:3.5mm Male to Female OMTP to CTIA Earphone Adapter for Microphone Conversion Description: Plug and play, solve the problem of incompatibility between mobile phone and headset. Gold-plated head, shielding electromagnetic interference, strong and pull-resistant. Ability to convert CTIA handset headphone microphones to OMTP or OMTP to CTIA. Two-way mutual conversion, automatic switching, good interface contact performance. Can be used for a long time, compact size and light weight. Material: Zinc Alloy Size Chart: Length: Approx. 37mm/1.46 inch Package Includes: 1 Piece Conversion Plug SKU: ALU0011420078011299.Ability to convert CTIA handset headphone microphones to OMTP or OMTP to CTIA. 1 Piece Conversion Plug.