StarTech.com Headset Extensions and Adaptors - StarTech.com MUHSMF1M, The StarTech.com MUHSMF1M 1m 4-pole 3.5mm headset extension cable has 1 x male and 1 x female 3.5mm TRRS audio connectors. You can use it to extend the reach between your headset or headphones, and your iPhone®, mobile phone or laptop computer. The moulded strain relief prevents the cable from being bent at sharp angles at the TRRS connectors, to minimize the stress on the cable and on the device\'s connector. It can also allow you to move more freely while working at your computer with VOIP applications (Skype, chat programs, etc.).Backed by the StarTech.com lifetime warranty. StarTech MUHSMF1M 1m 3.5mm 4 Position TRRS Headset Extension Cable - M/F