The F1 to F4 keys are mostly for LED Backlight Control; with F1 we can turn On/Off the LED lighting, F2 is used for decreasing the light intensity while F3 increases the LED brightness and with F4 we will be able to change the LED modes. Of course, all this can be accessed while in Fn mode:
Going further to the F5-F8 arrangement, we will be able to adjust the key repeat rate from 1x to 8x, in case we need to issue commands faster in some games:
One of the interesting LED setups is the fact that we can assign as many backlit keys as we want, and save them in up to four profiles (F9 to F12). This can be done by pressing Fn+Pause/REC, select any of the F9 to F12 keys as the profile for the lighting key assignment, press the specific keys you want lit and then press again the respective profile key when finished (F9 to F12):
Under the Pause/REC, Scroll Lock and Print/Windows Key Lock arrangement we will be also able to find the multimedia keys:
Next to the Fn we also have the Windows key:
With the supplied key puller, the keycap removal can be done in a snap; the keyboard sample we have received was equipped with Cherry MX Brown switches, which is one of the most silent from the series; as other characteristics, we could mention that it is light, tactile, non-clicky:
By turning the keyboard on the opposite side, we will be able to see the large central sticker:
In the corners, Cooler Master has placed some linear rubber feet: