Sony MDR7502 Headphones Features: Headphone feature include: 30mm driver unit, closed ear design gold connectors and oxygen free cord, frequency response (60Hz to 16kHz) Technical Specifications: - Cost effective- Quality sound at a reasonable price - 30mm Driver Unit - For clear, high quality sound reproduction - Closed-Ear Design - Comfort and reduction of external noise interference - Stereo Unimatch Plug - 1/4 in. and 1/8 in. applications - Gold Connectors and OFC Cord - Reliable and stable signal connection and transmission - Supplied Soft Case - Protective storage