Lemeng Slim 3.5mm 1/8" Male TRRS 4 Conductor to 3.5mm 1/8" Female 4 Conductor Adapter(2-Pack) 4 conductor 3.5mm male to female adapter 4 conductor TRRS (tip, ring, ring, sleeve) adapter very versatile Headphone/Microphone Compatible Slim design for use with a mobile device case Packing:2PCS-4 conductor 3.5mm male to female adapter