The muhsmf1m 4 pole 35mm headset extension cable 1m features a 35mm 18 trrs audio connector on one end and a 35mm 18 trrs audio connector on the other making it easy to extend the reach between your hands free headset or headphones and your iphone mobile phone or laptop computer to ensure long lasting performance this high quality 35mm audio extension cable features molded pvc strain relief at each of the 18 trrs connectors which prevents the cable termination points from bend