IOS – Microphone has about one minute dictation limit on iPad Air 2

I found the answer from iMore's How to turn on and use Siri-like Dictation on your new iPad:

If Dictation gets confused about any of the words you speak, it will underline them in blue on the screen. If the word is incorrect, tap it to get a popup menu with alternatives. Tap an alternative to switch to it. You can also simply edit voice dictation text like any other text.

Sure enough, single-tapping on Claire gives me an option to change the text to Clare, and of course it works other ambiguous words.

A particularly useful example is when you mean Buy, and the dictation types By, with a blue underline. Tapping on that gives the two alternatives Buy and Bye.

it is possible to do it through bluetooth, dock connector, and 3.5mm headphone jack!

in order to use it though wifi you need a compatible application and i have never heard of such thing! after a little goggling all i found was bluetooth connected ones, because it offers a P2P connection witch is much more reliable!

(sidenote) mics though wifi routers could, be unreliable, specially in poor connection!

however there are mic's that include a dock connector dongle for a stable P2P connection something like this