This is a product that is gaining lots of ground with computer based audiophiles. The Signature Edition is dB Audio Labs flagship USB DAC and is a big improvement over their “regular” Tranquility DAC. It may cost $900 more but you are getting lots more too like a bigger power supply, better rectifiers, caps etc and newly patented technology (see their website for more info). We had this hooked up to our laptop and installed it in one of our system and can hear much better refinement, imaging and a fuller “body” of sound through it than just having the audio signal coming out from the laptop directly into the system via 3.5mm/RCA cable.
Cosmetically, the unit is in very good shape. Some very minor scuff marks here and there but nothing major. USB cable is included and unit will be securely packed for safe shipping.