OCC Litz, 4' length, Eidolic connectors for balanced operation (3.5mm extended shank and 4.4mm Pentaconn). Built for use with an Oppo PM-3 and Sony WM1A, 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. PayPal, shipped USPS Priority. No returns or refunds.