The Sennheiser HD-450 II Headband Headphones sports an over-the-head design, providing comfort, and ensuring that it remains firmly secure. It has a 3.5 mm plug, and a cable that is 9.84 feet in length. This headphone is compatible with personal audio, and has a stereo sound mode, thus giving the user an enjoyable listening experience. In addition, it has a frequency response of 14 Hz to 20 kHz, an impedance of 32 ohms, and sensitivity of 112 dB.