The compact yet powerful PHONON 4400 mobile headphones have been reintroduced with even more ease of use. They are especially durable compared to the previous PHONON 4400. Foldable and compact, these headphones are ideal for playback on smartphones and other mobile devices and for monitoring during DJing. The PHONON 4400's phenomenal performance lies in its powerful sound, which is unimaginable for its size. They are lightweight to eliminate the inconvenience of carrying and the discomfort of wearing them for long periods of time, yet nevertheless deliver clear, powerful bass with no muddiness. In addition, the PHONON 4400 is infused with PHONON's proprietary tuning know-how. This tuning method is original and actively incorporates approaches that would never be taken by major manufacturers. The flat, high-resolution sound quality without unnecessary coloration has an overwhelming sense of balance and is highly acclaimed by DJs and engineers around the world. The PHONON 4400 mobile headphones are still used by many people, including top DJs around the world. We hope you will experience the NEW PHONON 4400, which has been carefully crafted under the concept of “carrying the best sound quality you have pursued with ease. The PHONON 4400 comes in 1 model (matte black) Type: enclosed dynamic headphones Driver: φ40㎜ Impedance: 46Ω Maximum output sound level: 500mW Playback frequency range: 20~22,000 Hz Weight (including cable): 260g P lug: φ3.5㎜ old-plated screw-type stereo 2 way plug Cable length: 1.8m (4 wires LR independent ground connection)