The AudioQuest Dragonfly Cobalt USB DAC/Headphone Amplifier is a high-quality audio device designed for use with headphones. This unit, released in 2016, features a sleek blue color and is compatible with a variety of cables. With Dolby and Dolby Digital surround sound formats, this mobile/in-vehicle device offers exceptional audio quality through its USB input and headphone jack output. The AudioQuest brand ensures reliability and superior sound performance for an enhanced audio experience.