Beyerdynamic DT-252, One-Ear Headphones, Dynamic, Closed-back, Circumaural, Neodymium magnet, 80 Ohm Version, 100dB/IEC, 10 - 30.000 Hz, Weight: 170 g, Including connection cable with 3.5 mm jack and 6.3 mm adapter, Remark: Technically identic to DT250