Startechcom headset extensions and adaptors startechcom muhsmf1m the startechcom muhsmf1m 1m 4 pole 35mm headset extension cable has 1 x male and 1 x female 35mm 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 devices connector it can also allow