16cores silver plated (16 x (1mm x 17 cores)) 4.4mm to HD650 High resolving power, smooth sound transparent, Bifurcation audio cable with dual channels pins compatible with Sennheiser HD650, HD660 S, HD600, HD6XX, HD580, HD565, HD545, HD535 wired headsets Upgraded 16 core braided single crystal silver plated OCC wire and gold-plated tips, ensures HiFi quality sound, supports Hi-Res, DSEE HX, S-master HX and aptX LL, supports noise cancellation