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Amazon.com: OMTP to CTIA Earphone Adapter, Bi Directional Converter, Compatible with Most Smartphones & Tablets, Compact Size & Light Weight, Gold Plated Connector (3PCS) : Electronics
Gold Plated 2.5mm Male to 3.5mm Female Stereo Audio Adapter TRRS Converter(4 connector)+3.5mm M/F OMTP/CTIA adapter - Newegg.com
Amazon.com: Pomya Male to Female Headphone Audio Adapter,3.5mm OMTP to CTIA Conversion Earphone Adapter for Earphone Compatible with Smartphones and Tablets,OMTP to CTIA Converter(3PCS) : Electronics