Dali IO-4 wireless headphones are the entry level model in the series sitting beneath the IO-6. These are designed and developed in Denmark with class-leading battery life, comfort and sound. Dedicated Designers With 30 years of experience in creating high quality loudspeakers, Dali have turned to headphone design to showcase their expertise. Dali IO series have been crafted with passion for dedication for audio, ensuring the headphones meet high quality standards of sound reproduction. The aim is to provide a hi-fi sound quality that can be experienced wherever you go. Advantageous Design Dali IO-4 are a circumaural closed back headphone, designed to optimise comfort and sound quality. The closed back design of IO-4 mean they offer optimum passive noise isolation. The over-ear design minimises any air-leakage as it encloses the whole ear securely while the headband design ensures the headphones sit comfortably on the head, both of which allow a relaxing experience for the maximum amount of time. Soft Yet Durable Dali dedicated time into creating the best possible headphone design focusing on ear-pads, headband curves and ear-cup angles. IO-4 have headphones made from memory foam to mold to your head shape, and pads made from soft synthetic leather that feels great but is also durable. Authentic Dali Sound Custom 50mm drivers in IO headphone deliver an exceptionally realistic performance. Listen in high definition via Bluetooth or USB connections to hear your music collection sound better than it's ever done before. Power Saving Design It is built for extended listening with a comfortable, durable design and a natural transparent sound. A 60 hour battery life so you don't have to worry about running out of charge. These closed wireless headsets with 50mm drivers and Bluetooth 5.0 connectivity including AAC and aptX HD support. A 3.5mm jack and USB-C port for charging the battery is also onboard.