Sennheiser HD580 + DSP module + 2 sets of Radio Shack Gold Mini-to-RCA cables. These headphones are like new and probably only have 10 hours of playing time on them. I don't have the original boxes or instructions, but it's all pretty self-explanatory The HD580s use the same internals as the HD600. The only difference is the material of the outer shell. I am asking $125 and I will ship priority in the U.S.