Maxell HP-100 Stereo Headphones. These lightweight, open-air type headphones are ideal for MP3, CD players and all portable stereo devices. You can expect these high quality Maxell ear buds to give you dynamic sound reproduction from all sources. Plus the slide headband adjusts for a comfortable fit. Specifications: Driver: 30mm Impedance: 32 ohms Maximum Imput: 100mW Frequency Response: 20 - 22k Hz Cord Lenght: 4ft..