Before I purchased it, I didn't aware the size is only 8cm X 6cm X 2cm big. When I opened the box then found that is so small, it is solid built though. Tested it with optical and coaxial signal inputs are working good. When listen with the headphone, the sound quality is not that good may be due to the limited power by the USB 5V supply, however when drive my valve amp. performance is totally different. That is why I gave 4 stars but not 5. The manual in English and pretty straight forward to set up, just plug and play. For 40 dollars, it is a good buy and a good addition to my HiFi gears to listen to the no loss digital music.
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