Double Helix Molecule 2.0, OCC Litz, 7' length, Eidolic connectors for balanced operation (3.5mm extended shank and 4-pin XLR). PayPal, shipped USPS Priority in USA. Built for use with an Oppo PM-3 and Oppo H-1, but should work with any headphone with a balanced 3.5mm TRRS jack set up for Tip L+, Ring R+, Ring L-, & Sleeve R-, even if recessed. Perfect condition, no smoke. No returns or refunds.