I am selling my Dragonfly Red and my Jitterbug USB Filter. Both are in MINT condition. And yes it does make a difference with the Jitterbug. I used both with my iPhone and computer with TIDAL HI-Res most of the time. I’m not going to describe them or write a review. If you are looking at this you know what an icon this DAC/Amp is already. If not just do a search and you’ll find many, many excellent reviews on both..much better then I would bore you with. I don’t know where I put the little sleeve and end cap and box for the dragonfly so I am including a much cooler and better storage case that fits both of them. If I have your address and I find it some day I’ll send it to you, in the meantime you have a better and more expensive case. The Dragonfly retails for $200.00 and the Audioquest Jitterbug retails for $59.95. Here is your chance to save a lot of money. Shipping is included. CONUS only. No international shipping. PayPal please. Thanks for looking.