HDB581 are wireless, closed headphones of original design, which guarantees comfort and convenience even when listening for a long time. Converters with neodymium magnets with a diameter of 39 mm provide balanced frequency response and sound quality in high resolution. You can connect the headphones wirelessly to any Bluetooth-enabled device in version 4.0 and to the HSP 1.2, HFP 1.6, A2DP 1.2, AVRCP 1.4 profiles. They support MP3, AAC, SBC and aptX codecs.