This is a listing for the Fiio QX13, Estick, and a case to hold them. I bought these specifically to listen to the Dunu DaVinci. I've used them for less than a week, and only indoors. The sound is significantly different with the Estick! This is a set, so I recommend it! The QX13, Estick, and case are all completely unused, except for the short USB-C to C cable. I'm open to offers. Please provide a specific price in your comment, and I will consider it.