SONY HW700 digital surround processor with headphones for high-quality sound. - Brand: SONY - Model: HW700 - Accessories: Headphones, cables, instruction manual - Function: Digital surround processor - Connection terminals: HDMI, optical digital audio input Thank you for viewing. Operation has been confirmed, but since it has not been tested for extended periods, the battery life is unknown. Items not shown in the photos are not included, so please be aware of that. As this is a used item, the earphones show some signs of use, and the ear pads show deterioration and dirt (see photos). Please consider purchasing only if you understand that this is a used item. Due to the nature of this being a used item, please refrain from purchasing if you are overly sensitive. Also, to prevent swapping, returns and refunds are not accepted after purchase, so please be aware of this as well. The outer box has been disposed of, so it will be shipped in another cardboard box with cushioning material.