I have just received a parcel from amazon and this device works perfectly and is powered by USB.
I've had it running for a couple of hours powered by the Kemper and works perfectly. Can work 2 different ways: will add your kemper to your home/studio wifi network or create it's own network if you're on a gig. This solution won't work with a remote, but otherwise it looks like the neatest and cheapest thing.
There are a few different versions, but this one was the cheapest that I found on ebay UK, just under £20.
[Blocked Image: https://images-na.ssl-images-amazon.com/images/I/61XnHPPROZL._AC_SL1000_.jpg]