Lightweight headphones that reduce ambient noise by 95%. Up to 80 hours of battery life. Dynamic 1.18 in drivers for the ultimate music experience. 30mm Driver units deliver quality sound. Swivel folding design for listening flexibility. 1.2 Meter y-type cable resists tangles. 10 - 22000Hz Frequency response. Impedance: 24 ohms at 1 kHz. 1 AAA battery required (NOT included). Includes: Plug adaptor for in-flight use. Operating Instructions.