Watts on 2006 ford explorer rear door speakers?

What is the specs for watts on 2006 ford explorer rear door speakers

That information isn't easily available. What you can do is find out the wattage of the the stock radio, and then divide by the number of speakers you have, and that will give you a general idea. If you vehicle has a factory amp you'll have to account for that as well.

If you're just replacing the head unit, you'll be fine. If you added an aftermarket amp, then you'll want to replace the stock speakers.