Sennheiser HD 569 Closed Back Headphones with 1-Button Remote Mic 506829, NOB ———— Contents: Come with full accessories in retail box. New Opened Box Condition. Description Sennheiser are the successor to the popular HD 500 series. Excelling in versatility, the headphones come with a 9.8 cable with 1/4 plug for home use, and a 3.9 cable with a 1-button remote mic and 1/8 straight plug for managing calls on mobile devices. Featuring Sennheisers proprietary transducer technology, the headphones have an Ergonomic Acoustic Refinement (E.A.R.