I have an AlphaSmart NEO that I use. It's almost zero-EMF.
But the problem is, it doesn't have a USB port or an SD slot that I can use to instantly transfer files to and from a computer.
Instead it has an old-fashioned connection that only sends files to a computer through a USB port. And it can't receive files from a computer, except through an infrared port which I've never been able to get working right.
One idea I've seen is to get a cell phone, turn off everything that emits microwaves, and attach a keyboard to the cell phone through the Micro-USB port.
Anybody have a better idea for a really-low-EMF device?
I have an Alphasmart Dana that I bought on Amazon for $20 several years ago. It works great overall, but sometimes I need to reset it and restore my files from backups. (That's a common problem with older PDAs and similar devices, unfortunately.)
One big problem with it is that the software to conect it to a PC is not supported anymore, but there are quite a few free apps for doing that. If you really, really want to try this, you can send me a private message and I can try to help, although I haven't done it in about 4 years.
There are some newer smart keyboards, but I don't know which ones are good (if any of them are). Here's one example: