SPC GEAR SOFTWARE
In order to get the most out of your GK650K Omnis Mechanical Gaming Keyboard you should download the SPC Gear control software from their support page.
The first tab is called illumination so from here you can pick one of the 18 available effects, make your very own and adjust the brightness and speeds levels.
You can change the function of any of the keyboard's keys from the buttons tab as seen above.
Of course, you can also create macro commands and assign them to keys via the macros tab.
From the other tab you can enter the windows keyboard properties and change the USB report rate.
You can also check the software and firmware versions from the settings tab.
Here you can see the minimum and maximum brightness levels.