The Logitech Gaming Software
The headset will work pretty well without any software installed, but to get the full functionality of it you are going to want to download the Logitech Gaming Software. Once installed the first thing you are going to want to do is program the G keys. By default the G keys are set to Cycle Effect (G1), Surround Sound on / off (G2), Cycle EQ (G3).
There are a whole bunch of different commands you can choose from like multimedia controls, macros, mouse function, shortcuts, etc.
You also have the ability to add up to 5 more profiles with different G Key combinations. The software will scan for installed games and add profiles based on those games with commands for those games. It makes it much easier to set the G Keys to commands in different games.
In the lighting tab you can customize the lighting on the G logos as well as the light strips. Now you cannot make the G logo one color and the light strips another, but you can turn them off individually. Logitech has programmed in a breathing effect, color cycle, and solid color presets, but again you can add your own.
Moving over to the Custom Audio Experience tab you can set you levels for your headset and microphone as well as the bass and treble. There is also the sidetone, which will play the microphone through the headset. This will actually enable you to hear people and still have the headset on. Below that you have the advanced equalizer. On the opposite side you have custom equalizer settings, Logitech has 6 pre-programmed in, but you can add you own.
On the customize surround sound tab you can turn the surround sound on and off as well as select between Dolby Surround Sound or DTS HeadphoneX.