Kindle... sounds like a Kindle (I know sorry) reader, the low tech reading tablet thing, some of the models use Wifi rather than a built in 3 G dongle.
If the wifi is turned on, even with the reader "off" (IE in normal standby) it will poll every now and then to check for new books updates etc
My wife has the newer Paperwhite That shows up as "Paperwhite -Kindlexxx" my far older basic one shows up as "Kindle - xxx"