Where do you see this exactly?

I think I have seen it now, the "e" in e-All-in-One. According to my information, this stands for the ePrint functions that the printer supports: https://en.wikipedia.org/wiki...

Quote from a customer on amazon:
The "e" in front of the "AIO" stands for devices that have HP's e-Print function. With these devices it is possible to send files to the printer from on the road and have them printed. For this purpose, each printer receives an individual mail address from HP. This mail address only accepts print jobs, it does not send or answer mails. The prerequisite is, of course, that the printer is switched on. If you send it an email with a PDF from below, for example, it prints the PDF and has it ready in the output tray when you get home. Quite practical.

Hello Brimstone, I was offered this by a seller. Possibly it has to do with essentiel or economic. I have searched in vain on Google.
LG Arco93

Exact description:
See e.g. manual pages 99 ff insbes 101
Chapter .... What are web services?
Chapter.........Using Web ServicesSection....HP ePrint
http://h10032.www1.hp.com/ctg...