very lightly use daily( about 1 month old).  avg time use everday about 30mins.

since this need Headphone Amplifier to run this headphone, so I want sell this and buy the one without amplifier need headphone. 

please READ before you buying this.

Sennheiser HD 800 S Reference Headphone System

Open Box (no original packing/no retail box), Picture from actual item, You will receive exactly this item. Accesories:Please check carefully, What you see on pictures is exactly what you get., Tested working, item turns on, The Item Include: HD 800S, Connection Cable With 1/4" (6.3mm) Stereo Jack Plug, CH 800S Balanced Connection Cable With XLR-4 Connector, USB Flash Drive, Storage Bag.