Styleaudio from Korea, please see here for more info : Styleaudio: Reviews, Forums & News : UPDATED!
The TOPAZ is the highest model which is an affordable ultra high quality USB dac with headphone amplifier. See this Styleaudio page : Styleaudio: New model : Styleaudio TOPAZ for product details.
Normal price is US$450.00, we have a limited stock and our price offer is HK$ 3,000.00, that is 20% off discount ; please contact us for availability.