TNU1004 Features: * Headphone * Clean, linear low end response * High-performance drivers and low-mass diaphragms * Maximized power handling capability * 0.25" (6.3 mm) Phone plug adapter include * Open-back dynamic * Specifically designed for digital program materials * Impedance: 32 ohms * Weight : 4.0 oz (115 g) * Cable: 11.5" (3.5 m) * Connector: 3.5 mm stereo mini-plug * Driver diameter: 40 mm Includes: * Accessory included: 0.25" (6.3 mm) Plug adapter Specifications: * Maximum input power: 100 mw * Sensitivity: 100 db * Frequency response: 20 - 20,000 hz