AudioQuest DragonFly Red USB Stick DAC with JitterBug USB Data and Power Noise Filter JitterBug reduces the noise and ringing that plague both the data and power lines of USB ports JitterBug measurably reduces jitter and packet errors JitterBug improves dynamic contrast, warmth and resolution Dragonfly RED is Compatible with Apple OS X and Windows (7, 8.1, 10) PCs, DragonFly Red can be plugged into a USB port to bypass the host computer's compromised audio circuitry and deliver cleaner, clearer, more naturally beautiful sound to headphones, powered speakers, or complete audio systems The size and shape of a USB thumb-drive, DragonFly Red is a digital-to-analog converter with a USB plug at one end and a 3.5mm mini-jack at the opposite end