The Sennheiser PMX 60 Neckband Headphones enhance your musical experience by providing a balanced sound output. This pair features a 1-m long cable that provides better mobility. With 122 dB sensitivity, 32 ohms impedance level and frequency range of 18 Hz - 21 kHz, it elevates the audio impact. Suitable for use with MP3 players or CD players, it weighs a mere 55 gr.