They also seem to release a pin-compatible version to ES9018S.
http://www.dagogo.com/ess-technology-introduces-the-sabre-pro-series-of-dacs-setting-a-new-performance-bar-with-unprecedented-140-db-dynamic-range
In europe (EU) we have a law that says customer has 14 days to withdraw when purchasing goods. So don't think its up to the company to deside expire period if buing in europe.
http://europa.eu/youreurope/citizens/shopping/shopping-abroad/returning-unwanted-goods/index_en.htm
/ Micke