Bought to work with my old Marantz amp but never used (my wifi system was too ancient, and when I finally upgraded it, the new system came with its own interoperable audio streamers).
Top of the line, very high fidelity streamer. Paid over $600 a couple years ago; I see they are now $849 new (and black, not white). I find this one prettier.
Can't post links here but you can find these at bluesound dot com//products/node