Audio Technica SonicPro Closed Back Dynamic Headphones Closed-back headphones with comfortable fit for use with home audio and video systems. Offers high-quality sound for enhanced enjoyment of movies and music. Features: - Newly designed 40 mm drivers reproduce clear mid-low frequencies - Adjustable headband support provides comfortable fit even during extended wear - Large headband delivers comfortable and stable fit - Contoured earpads fit naturally over ears to help to provide rich bass Specifications: - Driver: Closed-back dynamic 40mm - Output Sound Pressure Level: 100dB/mW - Frequency Response: 20 - 22,000 Hz - Maximum Input Power: 500mW - Impedance: 40 ohms - Weight (w/o cable): 210g approx. - Cable Length: 3.0m - Connector: 6.3mm / 3.5mm gold-plated stereo plug