This is the HIFIMAN HE600. I purchased it in October of this year and was quite satisfied with the sound, but the fit wasn't right, so I'm reluctantly selling it. In addition to the planar magnetic resolution and smoothness seen in other HIFIMAN models, the dynamics have been significantly improved. In my opinion, comparing it to other models, it's like the Arya series, but with a more neutral soundstage and closer sound field, and more dynamic. Overseas forums have rated it as an upgrade to the SUNDARA, but I haven't been able to compare them as I don't have one. The manufacturer's warranty and original cable are included.