3.5 mm OMTP to CTIA Earphone Headphone Microphone Converter Adapter Right Angle Ability to convert CTIA handset headphone microphones to OMTP or OMTP to CTIA. Two-way mutual conversion automatic switching. Support microphone and wire controlling. 90 degree turn headphone microphone conversion plug good interface contact performance. Gold-plated interface to ensure lossless sound transmission. Can be used for a long time compact size and light weight.