Lightweight, sealed headphones that are suitable for outdoor use with high-quality sound I adopt a dome-shaped housing proven as a professional studio monitor. It is equipped with a 40mm diameter unit using high-efficiency neodymium magnet. Sealed headphones lightweight, robust adopted the piano wire to the head band. I adopt a 1.2m cord suitable for memory audio equipment. It is attached with 2m extension cord that can respond to home use. It is attached with a stereo mini plug adapter large. Commodity Description ● adopted a piano wire in recruiting and head band 40mm diameter unit with the recruitment and high efficiency neodymium magnet dome housing proven as a lightweight, sealed headphone professional studio monitor that is suitable for outdoor use with high-quality sound the closed-type dynamic: with / [speaker part] ■ format attachment ● stereo mini large plug adapter 2m extension cord that can respond to adoption ● home use a 1.2m cord suitable for sealed headphone ● memory audio equipment, lightweight robust (IEC (International Electrotechnical Commission) in length) ■ code 1000mW:: stereo headphones ■ Impedance: 40Ω ■ playback frequency: 7 ~ 22000Hz ■ use unit: diameter 40mm ■ sound pressure sensitivity: 99dB/mW ■ maximum input about 1.2m ■ plug: (including code), (without cord) about 153g about 165g ■ accessories: stereo mini-plug straight-■ Mass stereo large plug adapter (diameter 6.3mm, 24k gold plating), 2m stereo mini extension cord, carrying pouch /