AudioQuest Dragon Tail USB Extender for Dragonfly DAC DragonTail is a USB extender for use when a USB device (such as AQ's DragonFly or a Flash Drive) is too large to fit next to other occupied computer ports. DragonTail's flexibility also makes it safer to use USB devices on airplanes and in other mobile environments. 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 performance. Features DragonTail measures 4.4 inches (112 mm) from end to end, and its flexibility makes it safer to use USB 2.0 devices on airplanes and in other mobile environments. Solid 5% silver conductors Foamed-polyethylene insulation to maintain critical signal-pair geometry Direct-silver plated (male) USB contacts