From JCAT website:

INSTANT SOUND QUALITY UPGRADE FOR ANY STREAMING SETUP.Connect to an available USB port on the audio device or computer. Removes power supply noise and remarkably improves sound quality.FREE WORLDWIDE DELIVERYSPECIFICATION:Built-in large high-end audio capacitor in a resin case instantly removes power supply related noise, improves sound quality and transparency.Made from the highest quality natural Ruby Mica available only in Bihar, India.Ruby Mica capacitors are responsible for beautiful and real sound of high-end Japanese amplifers. Thanks to the USB ENHANCER, this realism can also be felt in a streaming setup.10 cm high-quality USB cable is attached to the resin case.Connect to any free USB port in a music server (streamer, router etc.) and experience music in higher clarity.Multiple USB ENHANCERS can be installed for more intense effect.Manufactured for JCAT in Japan.watch