I've got to admit I've only recently discovered that feature:
It is possible to sent MIDI-clock information to the Kemper via MIDI-input. This way I could for example synchronize the Kemper's tempo to Cubase. I could even use a tempo track that would make the song faster when going to the chorus and the Kemper would follow. All you have to do is to make sure the sequenzer sents MIDI-clock to the MIDI-port the Kemper is connected to.
That might also be useful for people who play large stages and have a sequenzer runnig anyway. It could control the tempo of the Kemper as well so no more tap-tempo in that case 