Hi Roger,
On Amazon, there is some limited data for this device, and if you scroll down there is a section marked 'Reviews with Images' – this includes a tiny two page data sheet in 'Engrish'. I was able to save this image, paste it into a LibreOffice document, then enlarge it to A4 page size. Naturally this ends up rather indistinct without further processing, but it is just readable – may be some help.
**LINK**
The first part of the 'chinese' document mentioned above is actually Bulgarian, and can be simply copied and pasted into Google Translate, when, as mentioned, it produces a reasonably intelligible output – Ii did try to copy it into here, but although Google produces a fairly well ordered text which is not difficult to read, it loses the formatting when pasted into this message, so difficult to read here.