Sennheiser + Drop HD 8XX Headband Headphones 509479 - Black Description: Condition: New Opened BoxFeatures:Drop + SennheiserHeadphone type: Open-backEar coupling: Over-earDrivers: 56 mm ring radiator dynamic driversImpedance: 300 ohmsFrequency response: 4 Hz – 51,000 Hz (-10 dB)THD: 0.02 % (1 kHz, 1 Vrms)Contact pressure: ~ 3,4 N (± 0,3 N)Weight (without cable): 11.6 oz (330 g)IncludedCable with 6.35 mm (1/4) TRS single-ended plugCable length: 9.8 ft (3 m) Shipping: We Accept PayPal, Visa, Master Card,Free shipping for all orders.Orders will b