Superlux Closed-Back Studio Monitor Headphones HD661 WHITE

Driver Unit: 40mm dynamic type/neodymium magnet Sensitivity: 102dB SPL (1mW) @ 1kHz Frequency Response: 10Hz ~ 20,000Hz Impedance: 68Ω (1kHz) Accessories: 3.5mm to 6.3mm gold-plated adapter plug, 1m and 3m headphone cables, headphone cable retention clip, carrying pouch