Massdrop x Sennheiser HD 6XX Open-Back Headphones Description: Condition: New Opened BoxFeatures:Massdrop x Sennheiser HD 6XX HeadphonesMassdrop x SennheiserColor: Midnight blueTransducer principle: Open, dynamicFrequency response: 10 Hz – 41 kHzTHD: < 0.05%Nominal impedance: 300 ohmCable length: 6 ft (1.8 m)Connector: ⅛ in (3.5 mm)Weight without cable: 9.2 oz (260 g)Made in Romania Included⅛–¼ in (3.5–6.35 mm) adapterMassdrop x Sennheiser HD 6XX Headphones Shipping: We Accept PayPal, Visa, Master Card,Free shipping for all orders.Orders wi