Sennheiser headphones HD The new closed-back Sennheiser wireless headphones create a lively music environment for the ears. Dream away on the fine sounds of your favorite playlist on the beach or on your bike to work! This sturdy headphone is made of strong material so that it will not break in the bag. The headphones are foldable and can be stored in the supplied case. That the headphones need to be charged may seem like a disadvantage, but after a battery charge the battery can last no less than 8-9 hours! Noise canceling The fact that the headphones are wireless does not make the sound quality worse. These headphones are enriched with state-of-the-art wireless technology with audio codec for reliable transmission of true hi-fi sound. The innovative noise canceling function also makes the headphones ideal for studying soundlessly during the exams. Moreover, a button panel is placed on the headphones so that calling, changing music or adjusting the volume is a breeze.