The Lumin U1 Mini is a scaled down version of their phenomenal U1. It is a digital transport only (ie there is no internal d/a converter) for the purest experience and so that you're not locked into dac choice.
Capable of upsampling and downsampling all the way from 44.1kHz to DSD128 and supporting playback of DSD256, the Lumin U1 Mini matches its bigger brother, but at a more affordable price.
Transport-only unit combines the best of Lumin U1 and Lumin D2. Identical processor supports DSD256 and 384khz playback, quad native clock system for precision timing, low noise shielded switching power supply, etc.
More specifications can be found on Lumin website: http://www.luminmusic.com/lumin-u1-mini.html