StarTech.com 1m 3.5mm 4 Position TRRS Headset Extension Cable - M/F - audio Extension Cable for iPhone Molded strain relief prevents the cable from being bent at sharp angles at the TRRS connectors, to minimize the stress at the plug termination point Provides greater flexibility by enabling you to move more freely, while working at your computer with VOIP applications (Skype, chat programs) Backed by StarTech.com lifetime warranty 4-pole 3.5mm connectors with molded PVC strain relief 90% Spiral Wrapped Connector provides shielding against EMI and RFI interference