Well I'm sure it does what it says on the tin as adslmax says but the only way to check is to find out for yourself....
I have a question though: with both connections in use, which external IP address will be returned if you look it up? I suppose the answer might whichever connection it's using at the time depending on what you are doing (see links below) .
I have another feed available via WiFi so will give it a try in the next few days.
THIS LINK will show how it works with an illustration of its Control panel and
HERE for how to download a single file faster using both connections but needs the aid of a download manager to chunk the file to aggregate properly. So it does need some help.
You can switch the aggregation on and off if you want.
The only oddity I can find is that it says somewhere it can only handle 50Mb max?
If anyone finds more useful info then please post.