Features: 1. Patented durable structure. 2. Comfortable, self-adjusting headband pads. 3. Comfortable, long-lasting ear pads. 4. Detachable, single side cable. 5. Cable clip included Professional monitoring headphones. • High resolution drivers • Precision tuned acoustic chamber • Optimized headband pressure • Light weight Applications: Studio, DJ etc Specifications: Type: Dynamic, semi-open Driver: Ø50 mm Sensitivity: 98 dB Frequency Response: 10-30,000 Hz Max. Input Power: 300 mW Rated Impedance: 56 Ω Cables: 1-meter & 3-meter straight, single-sided;plug-in cable on headphones (mini stereo connector) Connector: Gold plated stereo 3.5mm plug+6.3mm adapter plug Net Weight (without cable): 222 g HD668B Professional Studio Standard Monitoring Headphones: The HD668B is a semi-open dynamic headphone whose sound quality meets the demands of even professional recording studios. The balanced and high definition sound of the HD668B assures that a professional sound engineer can have full confidence when mixing down or during post production. Its patented sturdy headband structure provides long-lasting durability even in challenging conditions, yet its light weight and optimized mechanical pressure provides long-term wearing comfort. The HD668B comes equipped with 2 detachable straight cables:The short cable is 1-meter long for personal sound source on-the-move applications and the long cable is 3-meter long for professional monitoring applications. These cables can be connected together for even more distance if desired. Included cable clip can secure detachable cable from pulling out by incident.