Hughes&Kettner WMI-1 Wireless Midi Interface

This will be necessary if you want to connect your GrandMeister to the ipad app. Just be careful when upgrading IOS on your device, check if anyone has reported any issues before going forward with it. I bought this device when IOS 14 came out and it took almost 3 months for apple and H&K to fix the issues. Other than that, it works great! You can control pretty much every aspect of the amp with the app.

Probably the worst value for money product I have ever bought.
It only works with iOS.
Have to say it came in handy, but I can get along without it.
I can't send it back because of the extra charges I had to pay to import it to the UK. I can't claim them back it seems along with the handling charge forced upon me by UPS.
Until this settles down I won't be buying from Thomann for the foreseeable future.
Not their fault, we left the EU....