Interface Type: 3.5mm-3.5mm Interface Interface Cable length: 1.5m Line Material: cloth lanyards Color: Black Packing content:1 * 3.5mm Cloth lanyards headphone audio extension cable This headset extension cable up to 3 meters, the other is 3.5mm male, the other end 3.5mm female, to connect the same kinds of headphone plug size, whether listening to music, receive audition or for laboratory extension can be used.