Good streamer that does not need wi-fi or internet to play local files

Let me reiterate I am NOT planning to use BT to play the local files but to "control" the music playing. The music playing is thru the USB connection which support hi-rez files to which I was referring.

I have two humble systems including Wharfedale Linton / Burchard S400 II, Parasound A23 / NC 2125 v2, Ifi Zen Stream, Topping E70 Velvet / Smsl Do200. My budget for the streamer is up to $1k or slightly over.

Although not what I am looking for but it is good to know Auralic Aries G1 could stream music using BT when the internet is out.  Thanks, @jond.  It will be a viable option if the G1 is equipped with latest BT standard as mentioned by @vonhelmholtz 

Nope, ifi zs does not support BT and that is why I am asking the question. And I can tell you why I am asking the question BECAUSE the ZS’s wi-fi suddenly quits on me. The plug-in internet is still working but wi-fi connection is DEAD. In 8 months! What a reliable product from British company?

Now, with Intel NUC 10, are you talking about a dedicated mini PC for music listening with i7 core, 2 usb connections (USB 2/3), type C port, ethernet port, HDMI and BT connection? How many GB of ram? OTHER THAN ROON, what software can I use to control software for music playing thru BT on cell phone? How is the SQ? I just switched from PC/Mac to streamer 8 months ago and it will be hard pressed for me to go back (although being a dedicated PC) if SQ is not good.

Thanks and I figure that is similar to the USB port housed in some CD players that can be hooked with memory stick or storage for playing digital files sequentially. To that end, I think FiiO R7 provides a better music streaming / playback experience thru its own FiiO Music app in the "Pure Music" mode, which does not rely on active wi-fi, internet or bluetooth. The optional remote can be purchase to remotely control the music playing showing on the screen. The price point is attractive too as $700. Nevertheless, the sound quality is not as good as Node Bluesound UNLESS you use the balanced output, according to Darko. Well, for the time being, let me stick to the defective Ifi ZS for a little while longer and wait for the next revolutional gear to come up.

I was confused. Wi-fi is a type of "internet" or "LAN (Local Area Network" too that is shared between mobile devices via hotspots and radio wave transmission. The difference in terms of communication standard is that Ethernet is IEEE 802.3 based and Wi-fi is IEEE 802.11 based. When there is power outage and ethernet is down, as long as your cell phone or other mobile device has active "hotspot", the LAN can still be kept functional and, consequently, the streamer will still be able to stream music via wireless LAN. Most of the music playing app is developed / coded upon ethernet / wi-fi.

Bluetooth (BT) is totally a different animal although it is also a wireless technolog. Wi-fi enables connection between the mobile devices and the internet / LAN, while BT connects and transfers data between two devices in shorter range via electromagnetic wave. Very few if any streamers actually develop app on BT.

Also, based on my limited knowledge, Aurender does not have a Wi-fi or BT components built in (see below) but you could add an optional wi-fi adapter to enables WLAN.  The Conductor app works on LAN in either hard-wired or wireless form but definitely not on BT.  You might be confused wifi with BT for the aforementioned reason.

Power over ethernet or ethernet over power?  Confused again but who cares as long as it works.  Thank you @ghdprentice.  I like awesome tech like this...

Got it.  Almost make a mistake.  What brand do you use?