Beyerdynamic DT 252 Single Ear Headphones EFFICIENT AND VERSATILE Hear your sound with clarity without sacrificing your awareness. The beyerdynamic DT 252 Headphones are the perfect choice for situations where being able to hear what's happening around you is a necessity. The single-sided design places a high-performance transducer in a closed-back ear cup on one side, providing accurate sound reproduction from 10Hz to 30kHz. The circumaural ear cup sits comfortably over your ear, whilst the padded headband rest over your head and clamps just above your ear on the other side. The headband is fully adjustable, allowing you to easily adapt the DT 252s to suit you. IN THE BOX - beyerdynamic DT 252 Single-Sided Headphones, 80 Ohm - 1/4'' (6.35mm) Jack .