AudioQuest Dragonfly V1.5 USB DAC + AudioQuest DragonTail USB 2.0 Extender Dragonfly v1.5 - Plays All Music Files: MP3 to High-Res ; Drives Headphones Directly ; Variable Output Drives Powered Speakers or Power Amp l DragonFly v1.5 plugs directly into a USB jack on a Mac or Windows PC. By bypassing the computer's internal sound card, DragonFly delivers much more articulate, dynamic and involving sound than what can be heard from the computer by itself, turning DragonTail's signal-carrying conductors are controlled for digital-audio directionality for more engaging, "3D" sound. Like all AudioQuest cables, components and accessories DragonTail is designed and manufactured for low distortion and maximum perfo Fixed Output Feeds Preamp or Receiver ; Asynchronous Transfer Ensures Digital-Timing Integrity ; Dual Fixed-Frequency Master Clocks Enables Optimal 'Clocking' (Digital Timing) for All Sample Rates Fixed Output Feeds Preamp or Receiver ; Asynchronous Transfer Ensures Digital-Timing Integrity ; Dual Fixed-Frequency Master Clocks Enables Optimal 'Clocking' (Digital Timing) for All Sample Rates