DragonFly Cobalt is a portable, plug-and-play USB DAC (digital-to-analog converter), preamp, and headphone amp that delivers far cleaner, clearer, more naturally beautiful sound to headphones, powered speakers, or complete audio systems. With an attractive enclosure whose overall size and shape match that of a USB thumb drive, DragonFly easily connects to laptops, tablets, and smartphones, either directly or with an appropriate USB cable, such as AudioQuest’s high-performance USB-C DragonTail (included). Plays all file formats/soundtracks: MP3, MQA, high-res, etc. 2.1-volt output easily drives most headphones. Compatible with Mac and Window computers, Android and iOS devices.