Applies to: KS Rack, KS 4, KS 5
The latest OS version for the KS4, KS5 and KS rack is 2.1.02. To check to see which version of OS is installed in a KS, power the KS up while holding down the number 5 button. The screen will show KS Keyboard or KS Rack 2.1.02 if OS 2.1.02 is already installed. If it is not, this OS can be downloaded from the KS Rack downloads page or the KS 4/5 downloads page.