The sound is very good. I can stream any tonal difference between the quality and the notice of the quality of connection via 3.5mm jack.
A big plus is the power over 5V USB with built-in battery, I try additional transformer plug where to go to avoid. The box can be therefore nicely operate via USB output.
The receiver is completely made of plastic are very light and small. Processing I think for the price ok. The receipient is recommended for those who are looking for a good and affordable solution for music streaming via Bluetooth.