The Koss KTXPro1 is a lightweight, adjustable headphone that provides portability with great titanium sound. The adjustable headband provides a comfortable, secure fit as you travel to work, home or anywhere in between. The inline volume control and open, hear-through sound provide the convenience in portable music.The KTXPro1 titanium layered diaphragm delivers accurate sound reproduction for the full Sound of Koss. With a frequency response of 15-25,000Hz, the KTXPro1 produces high quality sound performance. Equipped with a straight, 4-foot dual-entry cord, and an 1/8 in. and 1/4 in. adapter, the KTXPro1 is perfect for home and portable use. The open foam ear cushions provide an open, hear-through sound.The KTXPro1 is covered by the No Questions Asked Lifetime Warranty.