This is an iFi audio AC Purifier that suppresses power-related noise and brings out the original performance of audio equipment. Simply plugging it into an outlet reduces high-frequency noise and power distortion, making it easy to experience effects such as: - Improved background silence - Enhanced clarity of sound contours and positioning - Reduced harshness in the high frequencies It's an accessory that easily elevates the overall quality of your system. It's a beautiful item with almost no signs of use. * Operation confirmed * Complete with all accessories Thank you for looking.