Superlux professional monitor headphones HD668B semi-open

○Semi-open type, ○Driver unit: 50mm dynamic type/neodymium magnet ○Sensitivity: 98 dB SPL (1mW), ○Frequency band: 10Hz ~30,000 Hz ○Impedance: 56 Ω (Copper-coated aluminum wire), ○Weight: 222 g (excluding cable) [Accessories] 3.5mmΦ → 6.3mmΦ gold plated conversion plug, headphone cable 1m, 3m each 1 piece Headphone cable retaining clip, carrying pouch