There doesn't seem to be a manual on the EZ Reader or Astak sites at the moment that I can see.
However, there is a manual on the Jinke site
http://www.jinke.com.cn/Compagesql/E...ice/manual.asp which is for the V5. Most of the manual seems similar except the title page and contact details. For the original Astak one, I would suggest contacting Astak Support at
support@astak.com
It would be ideal if Astak could have a pdf of the manual as an available download at both their websites.