From the quick glance at that link, this is just a portable multichannel PA. The original request was for a portable PA with an included wireless microphone.

This brings up a good point, though: You can definitely add any wireless microphone to any PA system. So it's certainly not out of the question to shop for them as separate components. If you buy them as separate components, then if one of them fails or if you want to increase its quality, then you only have to replace one of them instead of replacing the whole thing.