A:AnswerYou can connect as many wireless devices as you want to with this printer, as long as all of the devices are on the exact same wifi network and have been setup.
As far as the wifi network, if you have dual band where you have a 5g option you will want to have the printer and everyone else on the regular 2gb wifi band.
For computers you will need to download the print drivers for this machine to your computers in order to print wirelessly. Just Google "Print drivers for Epson ET (insert printer model #)."
For mobile devices download the Epson app, unless you have an iPhone or iPad then you can just Airprint
A:AnswerThis likely has to do with the amount of memory in the printer. PDF files are much larger in most cases and can take longer to transfer to the printer. It's also possible that the document is having to be transferred to the printer in chunks due to the amount of memory in the device. Unfortunately, I wasn't able to find any information on how much memory this product has on Epson's website, so I can't confirm this.