Up for sale is a new Waversa Systems WStreamer.  I will be importing more and more of their product line as interest grows.  This is an excellent unit that when coupled with a 5V 1 amp linear power supply - such as a Sbooster for clean and ample current was the most economical yet effective improvement in my system. 
  
Internally is a microSD card.  I have sourced a SLC SD card which improves sonic qualities.  MLC vs SLC - single layer capacity vs multilayer.  SLC typically have less memory for their stated chip use but less noise.  This is a $100 additional option.     
  
Key Features:   
  
Network to Coaxial, USB Converter  
 
Milled from a block of duralumin for reduced vibration/jitter.
  
5V Single Power input
DLNA, AirPlay, Roon Ready, WNDR Support
Coaxial - 44.1KHz ~ 192KHz / 24bit
USB - 44.1KHz ~ 768KHz / 32bit, DSD64 - DSD512
System Update via Network and SD card
Note: WNDR - is a proprietary Waversa Codec serving the same function as Roon RAAT but more organic.  Requires a WNDR capable unit.