The Superlux HD-681EVO is the next generation of HD-681 headphones. In addition to the HD-681"s high quality, rich bass, crystal clear high resolution and accurate sound field positioning, the HD-681EVO features new, slender updated styling and an improved smoother treble frequency response. The HD681EVO headphones feature a semi-open design intended for use in professional monitoring applications. These headphones feature premium quality audio components paired with an ergonomic design. The self-adjusting headband provides the listener with a great fit and these durable headphones can even be twisted for use in single ear monitoring. The HD681EVO professional headphones are an excellent choice for a wide range of audio listening tasks, including recording studio monitors, headphones for MP3 players or video games, computer/digital audio or any pro audio application. The HD-681EVO headphones ship with a 1 meter and 3 meter straight cable, a cable clip, a gold-plated 3.5 mm to 6.3-mm stereo adapter and a soft carry pouch.